Organic Fertilisers - Contamination with Microplastics Common - Take Care

Users like to belive thay are being positive for the environment by using waste organics that have been converted to organic fertilisers -small pellets or even as bagged compost or by the trailer load.

Recent studies however, confirm the presence of considerable amounts of microplastics in many of the organic fertilisers used around the world.  Most work has been conducted in Europe and North America, but it is highly likely the situation will be broadly similar in Australasia.

While some effort - or even a big effort- is made to eliminate plastics in the original waste stream, it is rarely totally successful, and they get broken up in processing eventually being in the final product as microplastic pieces [ defined as <5mm font="" in="" size="">

There is a lot of discussion about microplastics in both fresh and marine waters, and land contamination is also of  concern.

We really do not understand the potential problem with land, and issues when contamnated areas are used for food production.

More below from a recent article which appeared online.
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ISTOCK, MAERZKIND

The recycling of biological waste from homes and businesses to make fertilizer, either through composting or fertilization, is a source of microplastic pollution, according to a study published today (April 4) in Science Advances. The particles were present despite efforts to sort and sieve out plastic contaminants either before or after the waste was processed, the authors note.

“The recycling of organic waste through composting or fermentation and subsequent application on agricultural land is, in principle, an environmentally sound practice to return nutrients, trace elements, and humus to the soil,” the study authors write. “However, most household and municipal biowaste is contaminated by plastic material.”

See “Plastic Pollutants Pervade Water and Land”

Microplastics, which the new study defines as plastic particles smaller than 5 mm, result from the breakdown of plastics, and are pervasive both on land and in the oceans. While the extent of their environmental and health effects is not clear, studies have found they’re detrimental to the health of organisms such as earthworms and rodents, and that they make their way into human food supplies.

In the new study, researchers at the University of Bayreuth in Germany investigated fertilizer produced by a biowaste composting plant (which treats waste aerobically) and a biowaste digester (which uses an anaerobic process). There were fewer than 25 microplastic particles per kilogram in the compost from the first plant, while the freshly-digested fertilizer from the second plant had up to 146 particles per kilogram of the pollutants. By contrast, no microplastics were found in digestate from an agricultural energy crop digester, suggesting that the contamination in the products from the first two plants originated in the homes and businesses that were the source of the waste used.

Avoid Using Immature Compost

A recent warning is important for all users of compost - avoid immature compost as an organic amendment - it can do more harm than good according to Pam Pittaway at USQ.

Soil health specialist Dr Pam Pittaway has warned farmers of the danger of using immature compost on crops of all kinds.

Soil health specialist Dr Pam Pittaway has warned farmers of the danger of using immature compost on crops of all kinds, and advised that either curing organic compost yourself, or testing it and the soil for nutrients, is the best way to ensure organic amendments benefit crops.

Speaking at a recent symposium about soil health at the University of Southern Queensland (USQ) in Toowoomba, Dr Pittaway said knowing the microbial stability of your amendment and its salt content were the best ways to ensure your crop got the optimum nutrients.

“If you know the salt content of your amendment, and the plant-available and total nutrient content of your amendment, you might be able to reduce the amount of NPK fertiliser you put on your crop,” Dr Pittaway said.

This could result in farmers greatly reducing their inorganic fertiliser bills, but Dr Pittaway said the age and content of the organic amendment, or fertiliser, needed to be taken into consideration, and the purchase of product of indeterminate age or properties was a risky business.

“As soon as you put on something with readily available carbon as well as nitrogen and phosphorus, you stimulate a microbial feeding frenzy which can starve your crop. If soil microbes have access to fast food, they take up luxury amounts of available N and P, out-competing plant roots,” she said.

“Adding manure or compost high in potassium can also burn plant roots, as potassium is a soluble salt,” she said. 

“And when growers continue to add fertiliser nitrogen on top of past organic amendments, they can get an uncontrolled growth flush which commits your plants to an extra load; if they can’t support that during the growth period, they can end up shedding tillers, or can lodge.”

Dr Pittaway said root disease was also a possible symptom of over-feeding crops with organic amendments.

“The best way to get root disease in a crop is nutrient imbalance.”

“My advice is if you can’t afford good cured compost, invest in more soil testing, and put immature products on your least valuable crop.”- Dr Pam Pittaway

Australian horticulture and agriculture use a vast range of organic amendments, including pig and poultry manure produced, cured and used on-farm, and commercially produced preparations, most of which incorporate straw or green waste as a source of carbon.

Dr Pittaway said the best result from using cured compost achieved organic slow release which synchronised nutrient release with plant demand, and minimised grower expenditure on nitrogen, phosphorus and potassium (NPK) inputs.

“My advice is if you can’t afford good cured compost, invest in more soil testing, and put immature products on your least valuable crop.”

Dr Pittaway said producers needed to be aware of the business model of some waste management businesses, which sought a fast turnaround on organic amendments.

“Some businesses need to push product out the gate to make space for more waste, and while Australian Standards say certain aspects of organic amendments must be tested, those results won’t necessarily tell you what’s best for your crop or soils.

“Instead of a six-week turnaround, which is what some waste-management businesses operate on, you want to use organic amendments that have been cured for 16-20 weeks, because immature compost could do more harm than good.”

She said farmers should also be aware of the environmental risks of over-application of organic amendments, which can put phosphorus surplus to the crop’s requirement into waterways.

Dr Pittaway has conducted studies on a number of organic amendments including cotton trash, feedlot manure, sugarcane waste, and sawdust in broadacre and horticultural applications.

“Fully cured compost costs more but immediately conditions your soil. Humus-like organic acids in cured compost are very good at holding moisture and buffering against acidification, and can make more phosphorus available. Adding humus-like, cured compost builds the stable, long-term organic fraction back into your soil.

“If it is fully cured, you can build a slow-release nitrogen bank [ in the soil] which will release nutrients in synch with the crop’s development.”

- Source: University of Southern Queensland.

 This advice applies to soil applied compost but may not be so important for use of above ground mulch, which also acts as a erosion protection and soil stability mechanism, while breaking down.  This is a factor with using green manure crops or crop residues on the surface.  If in doubt over using crop residuals or compost,  seek advice from a competent agronomist.

Composting - Vital for Better Soil Health, Fertility and Reducing Erosion

Composting reduces waste and builds healthy soil to support local food production and protect against the impacts of extreme weather, from droughts to heavy rainfall. That’s the message of two new reports from the Institute for Local Self-Reliance (ILSR):

State of Composting in the U.S.: What, Why, Where & How <http://www.ilsr.org/state-of-composting/> and

Growing Local Fertility: A Guide to Community Composting<http://www.ilsr.org/size-matters-report-shows-small-scale-community-based-composting/>

Compost is the dark, crumbly, earthy-smelling material produced by the managed decomposition of organic materials such as yard trimmings and food scraps. Compost is valued for its ability to enhance soil structure and quality. It adds organic matter to soil, improves plant growth and water retention, cuts chemical fertilizer use, and stems stormwater run-off and soil erosion. In the U.S., 40 million hectares (28% of all cropland) are eroding above soil loss tolerance rates, meaning the long-term productivity of the soil to support plant growth cannot be maintained.  

It might be worse comparatively in Australia, and China certainly has major problems!

compost production- commercial scale

Applying a meagre 12mm of compost to the all of the severely eroded cropland in the USA would require about 3 billion tonness of compost,” says Brenda Platt, the lead author of both reports and director of ILSR’s Composting Makes $en$e Project. “There is not enough compost to meet that need.  No organic scrap should be wasted.”

Compost also protects the climate:  it sequesters carbon in soil and it reduces methane emissions from landfills by cutting the amount of biodegradable materials disposed. (Methane is a greenhouse gas with a global warming potential 72 times more potent than CO2 in the short-term.) A growing body of evidence demonstrates the effectiveness of compost to store carbon in soil for a wide range of soil types and land uses.

Yard trimmings composting programs are fairly well developed in the U.S.

Of the 4,914 composting operations identified in the U.S. for State of Composting in the U.S., about 71% compost only green waste / yard trimmings (based on 44 states reporting). Food scrap recovery is slowly growing. More than 180 US cities and counties are now collecting residential food scraps for composting, up from only a handful a few years ago.  “There is more demand for composting, especially from businesses and institutions that want to source separate food scraps and not throw them in the landfill,” says Nora Goldstein, Editor of BioCycle, which conducted the state-by-state assessment of composting infrastructure and policies, “We not only need more infrastructure to compost these materials, we need more infrastructure to manufacture high quality compost that our soils — and climate — desperately need.”

 

compost berm used in erosion control

State of Composting in the U.S. is the first comprehensive review of composting basics, national and state statistics, job generation data, model programs, and policy opportunities.

The report calls for a national soils strategy and for new rules and programs to grow composting, especially at the local community level: including streamlined permitting for facilities, training programs, technical and financing assistance, strong recycling and composting goals, disposal bans, compost procurement policies, and more.  “The beauty of composting is that it can be small-scale, large-scale and everything in between,” says Brenda Platt. “Why send resources out of the community when our neighbourhoods need food and our soils are starved for organic matter?”

I would imagine that the report for Australia and the NT in particular would be quite similar.  However, around Darwin mulched green waste is widely used in domestic areas but much less so commercially and for landscape rehabilitation where it can be especially useful in restarting organic processes on damaged soils.

A sneak peek inside State of Composting in the U.S.: What, Why, Where & How:

·      Section 1, What Is Composting and Compost, describes the composting process, what materials can be composted, composting systems, and the many uses for compost.

·      Section 2, Why Compost?, identifies the key benefits of composting to create jobs, protect watersheds, reduce climate impacts, and improve soil vitality.

·      Section 3, Where Is Composting Happening, provides a national snapshot of composting infrastructure, current policies, and model programs that could be replicated.

·      Section 4, How to Advance Composting, outlines new rules and initiatives to grow composting, and describes the importance of a diverse and locally based infrastructure.

ILSR’s companion report, Growing Local Fertility: A Guide to Community Composting, features successful community-scale composting initiatives, their benefits, tips for replication, key start-up steps, and the need for private and public sector support. 

Produced by ILSR’s Composting Makes $en$e Project and the Highfields Centre for Composting, this guide highlights more than 30 diverse urban and rural small-scale locally based composting programs in 14 states and the District of Columbia.  They include schools, pedal-powered collection systems, worker-owned cooperatives, community gardens, and farms employing multiple composting techniques.

To download both reports, visit  www.ilsr.org/initiatives/composting

Composting Mortalities for Disease Control in Poultry Disease Outbreaks

This research improves the readiness of industry and government agencies to respond quickly to contain and eradicate emergency animal diseases in the Australian poultry industry.

The project investigated the feasibility of using composting for emergency poultry carcass disposal in Australia and validated the effectiveness of the process in eliminating Newcastle disease virus in poultry carcasses.

The project findings will assist the development of more robust emergency disease response procedures since the research that was undertaken simulated the scale and ‘real-world’ character of emergency mass mortality composting without compromising scientific integrity.

Composting of carcasses in mass livestock disease outbreaks has commonly been considered sceptically by many.  Yet, the physical conditions in well managed compost operations will achieve conditions that can eliminate disease organisms.

I am aware of work using the in vessel VCU technology conducted in the 1990s that was able to eliminate plant diseases by in vessel composting, as well as effectively transform poultry carcasses killed by a small outbreak of Newcastle disease in NSW into compost as well as eliminating the disease organism.

The timely work by lead author Kevin Wilkinson from Victoria, with a long connection with composting activities as well as government policy, shows it can be done on a large scale, a scale sufficient to handle a major disease outbreak.

The full document can be downloaded free from here - https://rirdc.infoservices.com.au/items/13-098

Well done to RIRDC for supporting the work.

There are lessons here also for some of Australia's near neighbours in handling mass poultry disease outbreaks.  After all, composting is not that difficult, over expensive, nor logistically problematical and it works!!

Another big plus for composting as an organic low energy driven solution.

Anaerobic Digestion - Is the Time NOW?

Anaerobic digestion seems to have had a recent surge in development around the world.

While small communal facilities are relatively common in rural areas of many less developed countries, including China, where in general they provide a decent contribution to energy and heat, often for hot water, it seems the first world has "discovered"the idea as well.

A recent article has shown an enormous increase in the UK, essentially a doubling of facilities since 2010.  While scale is not mentioned, it seems thay are referring to medium, industrial scale developments, not the sort that featured on Kevin Mcleod's  "Cabin in the Woods" tv show, for a single small weekend cabin.

It is a sensible idea - generate the methane upfront, with the organic residuals then suitable composted, or sometimes even gasified and used for energy.  I prefer the compost route, but not all areas are able to handle the volumes of compost generated.
Nutrients are a critical part of the remainder organics - too much of these are simply transported from farm to city and then lost down the sewer, or as food waste.  That connot continue, as the supply of most nutrients is finite.

The article is here - http://www.waste-management-world.com/articles/2013/03/rapid-expansion--uk-waste-to-biogas-anaerobic-digestion-industry.html

and clearly shows the rapid development in the UK.

Not so sure about Australia, but the trend is likely to develop.  There have seen some smaller systems developed including in WA, but none in the tropical north that I am aware of, yet that is where the bulk of organic residuals from crops - think sugar cane - are generated, along with food waste from cities and towns of modest size that could easily allow for development of suitable digestion and biogas systems.

 

Compost Berms for Erosion and Sediment Management

Traditionally erosion and sediment control seems to have started and stopped with using a silt fence.

Experience in the tropics often seems to indicate that silt fences may not be the solution that is best suited to these conditions.  They often are poorly constructed, commonly with poor insertion of the tail into the ground.  The intensity of rain commonly dislodges soil particles and along with a lot of water these fines clog the fence.  Common result is a failed fence.  Not to mention the need for a lot of maintenance.  They have a place – but there are smarter options.
Mulch and compost berms are gaining a lot more credibility in many seasonally wet tropical regions as a superior option to provide erosion and sediment management.  If you have tried them out………they are worth considering.

That is particularly true in north Australia where copious volumes of green waste are dumped at local landfill sites and then ground up at many of the regional towns and cities, to produce mulch.  This material is commonly then given at least a partial pasteurisation in a stacked row, and reused for garden mulch.  As well as garden mulch – it is ideal for building small mulch / compost berms that can provide excellent erosion and sediment management on construction sites.

The berms can be built with readily available machinery, or if available a mulch blower.

There are a range of on line resources available to help you gain more understanding, and the concept is strongly recommended by the US EPA as well as many other organisations.

http://cfpub.epa.gov/npdes/stormwater/menuofbmps/index.cfm?action=min_measure&min_measure_id=4

This link is to the US EPA site with many links to a range of construction site tools of which compost filter berms are but one………albeit very useful.

The next link is to an article where berms are compared to silt fences in the USA.  The article is over 10 years old, but mostly still relevant.  There are many advocates for the use of mulches but read about it yourself.

http://www.tceq.state.tx.us/assets/public/assistance/compost/compost_silt_fence.pdf
The article is a good overview of using berms.

And the trees or vegetation often removed for construction can also be utilised to reduce sediment and erosion – even laid in a simple matrix on the ground, with plenty of leaves and small branches inter mixed with larger branches.  It is a smart idea, a simple easy option to reduce erosion problems.  

More Compost Benefits - Biological and Economic

Alternative ideas about compost benefits are coming thick and fast.  Are there any more out there?

These are some additional ideas about the benefits of compost and very succinctly worded!  Remember that the previous post included those that were well recognised and testable - claims that could not be refuted easily.  There are a few that could be extended, but overall - comost has many beneficial attributes and definitely worth using or making - even at home, and it can be done in apartments too [ using bokashi, a microbial culture that aids organic breakdown].  Look it up if you have not heard of it - plenty of articles available.  Compost bins for domestic use are easy to make - and come in various options, but having a lid is usually a good idea as well, as some animals might access the compost bin.  Many are made in heavy duty plastic similar to the common mobile garbage bin.

Benefits of Compost

Enriches Soil
• Adds organic material
• Improves fertility and productivity
• Suppresses plant diseases
• Discourages insects
• Increases water retention
• Inoculates soil with beneficial microorganisms
• Reduces or eliminates fertilizer needs
• Moderates soil temperature

Prevents Pollution
• Reduces methane production in landfills
• Reduces or eliminates organic garbage
• Reduces or eliminates sewage

Fights existing Pollution
• Degrades toxic chemicals
• Binds heavy metals
• Cleans contaminated air
• Cleans stormwater runoff

Restores Land
• Aids in reforestation
• Helps restore wildlife habitats
• Helps reclaim mined lands
• Helps restore damaged wetlands
• Helps prevent erosion on flood plains

Destroys Pathogens
• Can destroy human disease organisms
• Can destroy plant pathogens
• Can destroy livestock pathogens

Saves Money
• Can be used to produce food
• Can eliminate waste disposal costs
• Reduces the need for water, fertilizers, and pesticides
• Can be sold at a profit
• Extends landfill life by diverting materials
• Is a less costly bioremediation technique


Source: U.S. EPA (October 1997). Compost-New Applications for an Age-Old Technology. EPA530-F-97-047.

Soils Benefit if Compost or Mulch is Used

Twelve Benefits of Compost

 Many scientists and farmers speak highly about the use of compost and mulch in soils.  There are often soil and crop improvements attributed to using these organic additions but are they real benefits?

While there is a certain amount of quackery over many soil additives, with some very dubious clams being made for them, it is now considered that there is a reasonably comprehensive set of truisms that can be attributed to compost use, with compost consderd in a broad sense to also include organic mulches.

These benefits and soil improvements are seen in temperate regions in the US, Europe and Australia as well as in tropical regions, with the latter often seeing very big improvements as the soils are tending to be lower in soil organic matter anyway.  Small additions of organic materials can mean big crop performance improvement.

The twelve well recognised benefits of compost are listed below. 

The following list of compost benefits have been approved by the Association of American Plant Food Control Officials (AAPFCO). This organization is made up of state Department of Agriculture regulatory officials from every state in the US. These claims are permitted to be made, and are considered as valid, on compost labels, literature and websites in the US and are also relevant elsewhere.

Compost -  

a. Improves soil structure and porosity – creating a better plant root environment;

b. Increases moisture infiltration and permeability, and reduces bulk density of heavy soils – improving moisture infiltration rates and reducing erosion and runoff;

c. Improves the moisture holding capacity of light soils – reducing water loss and nutrient leaching, and improving moisture retention;

d. Improves the cation exchange capacity (CEC) of soils;

e. Supplies organic matter;

f. Aids the proliferation of soil microorganisms;

g. Supplies beneficial microorganisms to soils and growing media;

h. Encourages vigorous root growth;

i. Allows plants to more effectively utilize nutrients, while reducing nutrient loss by leaching;

j. Enables soils to retain nutrients longer;

k. Contains humus – assisting in soil aggregation and making nutrients more available for plant uptake;

l. Buffers soil pH.

There are many articles and newspaper stories about the benefits of compost - so if you are not using compost or any other organic additions such as mulch, why not?  The photo shows mechanised compost production using a row turner.

In the tropics where rainfall is often in short higher intensity storms, surface mulches and composts provide a very effective surface barrier that prevents the dislodging of soil surface particles caused by the energy of impact of rain drops - this dislodgement commences the process of soil erosion.  A mulch cover can greatly reduce that problem while also controlling the infiltration of the rain.   "Cover"is a significant term in the universal soil loss equation [ USLE] used to calculate erosion, and is a factor that can be easily modified - as distinct from some of the other factors.  And soil cover is why dense grassland or rainforest is less prone to erosion.

The carbon in the organic materials often remains in the soil for some time so it also contributes to sequestring carbon, although not always for really long periods. [ that is another complicated issue - you could read about biochar or terra preta soils]
Surface mulch and compost are great contributors to better soils and the products grown in them!. 

Recycling is BETTER

Many working in the waste industry including recycling tend to believe that recycling is a better option.

Now there is Australian data to back that up.  Recycling is BETTER.  More jobs in that sector, substantial energy savings - 241 million Gjoules per year, plus water and greenhouse gas generation savings.

These are substantial benefits.

Yet in the NT we seem to be stuck in a time warp, with little progress other than send it to landfill.  Even the greenwaste is inadequately managed with the monster piles created in Darwin inadequately dealt with to use productively as a source of nutrients and carbon for agriculture, mining site rehabilitation and similar issues, including simple issues of land cover to protect the surface from erosion and the loss of soil into waterways.  Come on construction companies.......you can do better, so can the landfill site operators.

Mulch is expected to be in short supply in both WA and SA in future years if not already, due to significant market development by commercial companies and use of product in both commercial and domestic horticulture and agriculture. 

Then there are other materials such as glass and metals.  The latter are valuable and there is an effort to recycle generally, but what of glass and used tyres?  Both have had commercial development yet are not embraced.  Used tyres especially are a valuable component for civil construction and erosion management [ see www.ecoflex.com.au ].  Locally there has been a recent report on using glass in civil construction - but is it happening?  So far, it seems no.

Locally we can do much better.

There is a link to the full report below. However, one view of the report is that it has excluded any details on tyre recycling, data on organics recycling is somewhat dated and it lacks much direction on where the industry might go.  A lot of collated data, but I am not sure how useful it really might be, although it fills a lot of report space.
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Recycling trumps landfills
A new report confirms the Australian recycling sector is a bigger employer and generates more revenue than the landfill sector, but significant barriers remain to its growth and development.

These figures come as results of the release of the Australian Recycling Sector Report, prepared by consultancy Net Balance for the Department of Sustainability, Environment, Water, Population and Communities.

The lengthy and far-reaching report covers recycling processes and markets, the economic value of the industry, its environmental benefits, the regularity environment, standards, industry barriers, data collection and a future outlook.

Australian Council of Recycling CEO Rod Welford said the study "confirms [recycling] generates more jobs than landfill". Key aspects of the report are summarised below.

Volumes and dollars
The report draws on the most recent figures reporting that 26 million tonnes of material was recycled in Australia in 2008/2009. The study quoted the Inside Waste Industry Report 2011-2012, noting from this volume the value of recycling in Australia was around $6.145 billion.

Most of this revenue (50% or so) is attributed to the sale of recovered materials, but the report cautions markets are highly variable. More than half ($3.8 billion) of the revenue from recycling was generated in NSW and Victoria.

The contribution of the recycling sector to Australian employment is estimated at a little less than 1% - meaning approximately 22,000 people (full time equivalents) are employed in recycling in Australia.

This equates to 9.2 full time employees for every 10,000 tonnes of waste processed.

Environmental Benefit
While recycling remains a relatively small employer in Australia, the report makes clear the environmental benefits of recycling are considerable.

In total, the report estimates recycling generate approximately 241,000,000 GJ-equivalent of energy savings. This is enough energy to power around five million homes.

Other key environmental savings estimated include 172 gigalitre of water, equivalent to 10% of Australia's water consumption and 15 million tonnes of greenhouse emissions as a carbon dioxide equivalent.

Barriers to improvement
A summary of the barriers impeding greater recycling put a lack of investment in recycling and limited infrastructure as the primary challenges facing the sector.

A lack of business recycling uptake, the distance of materials to markets and consumer behaviour are also key barriers.

The full report can be downloaded from the DSEWPC website. Further information on the Australian recycling industry is also available in the Inside Waste Industry Report 2011-2012.

Sediment Socks Work Better with Compost

Compost socks

Using a sand filled coil as an environmental salvation tool is quite common. Seen round the streets and building sites these long thin “socks” are a common tool for erosion and sediment management in almost any site where sediment movement could be expected.

Traditionally, it was sand that went into these socks.

But performance can be enhanced, by the simple change from sand to compost or fine pasteurised mulch products. That is a simple and easy change to make, and it may cost nothing different.

An even better option can be to add some of the bioremediation type products available that have oil and hydrocarbon remediation attributes. There are a few brands available, but an easy one available in Australia is Enretech -1 , a powdered product that can be added to the sand or even the mulch mix.

Fine hydrocarbon materials, metals and rubber , commonly moved off roads in wet weather will be trapped by the socks and the hydrocarbons bioremediated, avoiding their movement into waterways.

The mulch is superior to sand in capturing the hydrocarbons, and as good or better in slowing sediments in general.

And costs about the same as sand filled socks.

So.........think about the issue and make the switch to a better sediment sock!

Additional details on installation and use are here -http://cfpub.epa.gov/npdes/stormwater/menuofbmps/index.cfm?action=factsheet_results&view=specific&bmp=120

and are applicable almost anywhere around the world.

Food Prices WILL Go Up

Mankind has enjoyed several decades of falling food prices, and relative abundance. Some even say that food prices have really been trending down ever since about the mid 1800s, although there have been some periods where that has not been so clear.

Modern agriculture has improved productivity of most farm animals, crops and even trees and enhanced efficiency of the use of inputs such that more is produced for less.

Recent trends in agricultural productivity increases are much lower, a lot of the productive land is used already, some even disappearing into urban sprawl, and new areas are far less available, or have other constraints eg clearing of rainforest, and may even be less productive intrinisically.

Malthus and his predictions are back in the spotlight.

A recent short article from the Lowy Institue in Australia, a respected academic institue has examined this issue more critically.
link is here - http://lowyinstitute.org/Publication.asp?pid=1565 and the publication can be downloaded as a pdf.

We need 71% more food production to feed the world population of 9.1 billion [estimated] by 2050.

So far, it does not seem to be recognised as a serious issue, with R and D expenditure on agriculture still declining, and some are suggesting that it will be difficult to again obtain the agricultural productivity gains of the past 60 years. These are years in which use of hybrid crops, the development of the "green revolution" in Asia with both wheat and rice, etc etc all took place.

Genetic modification has been embraced by some.......and strongly rejected by others.

Many scientists do think that some form of major genetic advance will be needed to ensure this food will be produced, and that there will be significant changes in how and where food is produced. Will we see more food produced within cities? Many think so, grown in novel ways too.....even vertically on walls, replacing the lawn with a food garden, food grown on building rooftops and there will be greater use of recycled water and nutrients including organic materials eg compost. These are happening in some way already around the world.

At present there is a nett movement of nutrients from farms to cities, and it just about all goes down the sewer or into landfill. That might have to change.

Science might be capable to develop new food production systems but social and cultural adjustments might be needed too. They might be more difficult.

Compost Awareness Week - May - 2011

It is International Compost Awareness Week this week...........with functions around the globe. The USA, Canada, UK and Australia are examples.

The message below is focussed on the East Coast of Australia, but relevant all over Australia.

Composting, the ‘intelligent’ alternative
Tuesday, 3 May 2011

That’s the message from the Centre for Organic & Resource Enterprises (CORE) at the launch of the sixth International Composting Awareness Week (ICAW). Organised in conjunction with Compost Australia (a division of the Waste Management Association of Australia), the week of events from May 1-7 will promote the benefits afforded to us all when our business communities and households get involved in composting.

“Composting is the responsible and sustainable thing to do for our planet,” according to CORE.

The major objectives of ICAW are to increase the diversion of organics from the main waste collection program through increasing awareness and participation in centralised composting, kerbside collections, home composting and community composting.“Each year over half the household garbage we produce is made up of food and garden organics. Most of this organic waste can be recycled by composting it”, said Eric Love, chairman of CORE.“If all this organic material was diverted from landfills and properly composted, it could be used to reverse the affects of climate change.

By applying this compost to gardens, farms and other land uses, millions of tonnes of carbon will be stored in the soil. This acts to lower the atmospheric temperatures that lead to changes in our climate.”

ICAW also aims to increase awareness and knowledge about the correct use of "soil-improving composts"; help reduce and recover food waste; and highlight the environmental and social benefits of composting including the opportunities to reduce our carbon emissions.

“Composting is not new. Compost has been used in crop production for over 4,000 years. Artificial fertilisers only became widely available a century ago. Australia is an old and eroded continent that is suffering from land degradation,” said Love.

Emissions from landfills are part of the Australian Federal Government’s carbon abatement initiative. If everyone composted, the total waste going to landfill could decrease by up to one third and emissions and disposal costs will drop, according to CORE.

Peter Wadewitz, chairman of Compost Australia said, “Compost produced by the recycled organics industry is already providing Australian landscape, horticulture and agricultural industries with affordable solutions to improve productivity and environmental outcomes.“Recycled carbon based products are also being effectively used to treat contaminated stormwater runoff and enabling the water to be reused, or more safely released into our waterways.”

Kimbriki Resource Recovery Centre is getting into the action of ICAW by offering talks, demonstrations and tours at its Ingleside/Terrey Hills site on May 3, 4 & 5 (at 10am and 2pm).

It will also give away 500 bags of Kimbriki Compost each day. Peter Rutherford, Kimbriki’s senior ecologist, will demonstrate simple ways to make great compost at home, and explain how this relates to healthy plants and healthy people. Australian Native Landscapes’ soil expert, Rob Niccol, will discuss composting and soil health; explain about the value of compost in larger projects and how it is being used to supplement Australia’s dwindling soil resources. He will also demonstrate the latest in mulch blowing technology and conduct a guided tour of the large-scale compost making operation at Kimbriki.

For more information visit: www.compostweek.com.au

How to Effect Climate Change - NOW

While we all wring our hands and think that government and our institutions are doing little about climate change - too hard, too many parties to get to work together and so on, there may be some options that can provide effect in both the near term as well as mid term.

And they use existing technology.........and can be implemented now.

Methane is a clear problem gas in the atmosphere, with much greater greenhouse gas potential than carbon dioxide. While methane from ruminants is often seen as giant problem, it is also a problem from termites. And either issue might not be fixed any time soon, although higher quality feed for ruminants does help in their case to reduce methane emissions.

The following link to a recent report published / presented on 23 February does seem to offer some sensible suggestions.

http://www.scientificamerican.com/article.cfm?id=cutting-black-carbon-methane-immediate-climate-change&WT.mc_id=SA_CAT_TECH_20110222

The issue of methane from landfill is a significant one and in Australia, many of the larger municipal sites do collect and utilise methane, with data available during the now aborted ETS scheme showing about an average of around 65% of produced methane being collected.

Australia is in the small league as regards landfills however, with much more potential in north America.

There is also a developing industry of anaerobic digestion of organic materials to generate methane, prior to aerobic composting. A sensible development, in both rural areas [ dairy herds, feedlots for example] as well as larger urban areas generating food wastes.

We need to start now though, if we are to have a reasonable chance of restricting temperature rise to the two degrees desirable.

Waste and Energy Management Gone Crazy

Stick a fork in it, we're done

Former Speaker Nancy Pelosi's Green the Capitol initiative is over at the House's Longworth cafeteria.

By Charlotte Allen
February 13, 2011

After about a month in control of the House of Representatives, Republicans haven't managed to undo as many deeds of their Democratic predecessors as they'd like. They couldn't get rid of "Obamacare," and they haven't made much headway in slashing the president's $4-trillion budget. But the GOP has succeeded in short order in one critically important venture: getting rid of the "compostable" cornstarch-based knives, forks and spoons that were a universally — and bipartisanly — hated feature of the House cafeteria operation.

The tableware, the color of mucus and as bendable as a pocket watch in a Salvador Dali painting (and thus unable to pierce any foodstuff firmer than the innards of Brie cheese), was the most visible manifestation of recently deposed House Speaker Nancy Pelosi's Green the Capitol initiative.

That was her carbon-cutting effort to use the food-service and other House operations to fight global warming and a host of other perceived environmental, health and social ills. During the lunchtime rush, you could observe dozens of staffers struggling to stab lettuce leaves and poultry pieces with fork tines that appeared to be double-jointed as well as dull.

But on Jan. 25, Dan Lungren, the GOP congressman from the Sacramento area who now heads the House Administration Committee, directed the House chief administrative officer to trash — so to speak — the composting program, which converts the dining service's cornstarch tableware, along with its biodegradable plates, trays, cups and drinking straws, into garden mulch.

It turns out that the composting program not only cost the House an estimated $475,000 a year (according to the House inspector general) but actually increased energy consumption in the form of "additional energy for the pulping process and the increased hauling distance to the composting facility," according to a news release from Lungren. As far as carbon emissions were concerned, Lungren concluded that the reduction was the "nominal ... equivalent to removing one car from the road each year." He plans to switch the House to an alternate waste-management system recommended by the Architect of the Capitol, in which dining-service trash would be incinerated and the heat energy captured. "Composting releases methane," said Lungren's spokesman, Brian Kaveney, and methane gas, as even the most warming-conscious among us have to admit, traps atmospheric heat far more efficiently than carbon dioxide, the usual bugaboo of the climate-change crowd. Lungren's stick-a-biodegradable-fork-in-it (if you can) stance toward a linchpin of Pelosi's grand green plan marks the latest skirmish in a lifestyle war that may on its surface seem purely partisan: GOP global-warming skeptics versus a Gaia-worshipping Democratic Party.

But I'd say the battle lines are really between an elite determined to impose upon a captive populace its notions of what is good for it — cost be damned — and the populace itself, which would rather not be coerced.

In Pelosi's home territory, the city of San Francisco, composting is mandatory for householders, who face a fine if they throw orange peels into the trash rather than into their city-provided composting bins.

Plastic bags are against the law in large-chain stores, and plastic water bottles are against the law in City Hall. In the name of health you can't buy a soft drink on public property in San Francisco, and soon you won't be able to buy a Happy Meal with a toy at McDonald's for your kid.

The uber-bohemians of San Francisco love this sort of thing; others, maybe not so much.

Green the Capitol was launched in 2007, soon after Pelosi became speaker. The Longworth cafeteria, catering to House employees but also serving the public, was to be the carbon-neutral jewel in Pelosi's green crown. Out went the familiar mystery meatloaf and high-fat coconut cake and in came food that was organic, sustainable, locally grown and fair-traded. I visited the Longworth cafeteria in early 2008, soon after it reopened under Pelosi's rule. Not only had food been replaced with "cuisine" (roasted corn and poblano chili, anyone?), but there was also a sea of didactic signage. One sign reminded you that the beef in the hamburgers was "humanely raised" and "antibiotic-free." Other placards touted "cage-free eggs" and "rBGH-free milk." A poster trumpeted the "pulper," a costly machine that made compostable cubes out of food waste. And then there were the recycling stations, where a lengthy set of rules instructed diners on how to separate trash items and dump them into four different slots (coffee cups in the "compostable" slot, coffee lids in the "landfill" slot).

No sooner did the cafeteria reopen than the grousing began, from both sides of the political aisle.

Some diners tried to puzzle out what turkey escabeche might be and wondered what happened to the fried chicken. Others complained about the new high prices that accompanied the new haute offerings."I just wished my pay improved" along with the food quality, a Democratic aide complained to a reporter for Politico. But the bitterest carping was over that compostable flatware. A Hill urban legend circulated that the spoons would melt in a cup of hot coffee. They don't, but they do bend readily enough to make you think you're Uri Geller.

When I revisited the Longworth cafeteria last week, three years later, I could not help noticing that although the flimsy cornstarch tableware was still in use — it will be retired as soon as the stock on hand is used up — a sea change had otherwise occurred. The sermony signage was gone, as was much of the art-food: the purple Peruvian potatoes and the "panzanella station," where you could build a salad out of arugula, figs and large wedges of stale bread. The salad bar these days is, well, a salad bar, with trays of chopped olives, shredded carrots and garbanzo beans to top the lettuce. Serious efforts have been made to cater to the needs of House employees who can't afford Armani suits. Among the stations with the longest lunchtime lines was one labeled simply "BBQ." Its special was a $5.50 pulled-pork platter with two sides (including classic mac and cheese) and cornbread.

The years from 2006 through 2010, starting with the Democratic takeover of the House and ending with the party's rout after two years of Barack Obama's presidency, were four years of an effort by a know-it-all liberal elite to impose sweeping and extreme social and fiscal measures on a centrist-to-right public: four years of turkey escabeche, so to speak.

Now, with a GOP House and divided government, there seems to be a return to normalcy, and it's beginning with the promise of knives and forks that work.

Charlotte Allen is a Washington writer.
Copyright © 2011, Los Angeles Times
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A stern reminder of what can go wrong with crazy ideas poorly implemented and totally out of touch with community ideas.

I am sure a program - a sensible program - could have been implemented in the cafetaria. And afterall, what would be wrong with ordinary plate and cutlery use, and washing them, with a sensible waste management program to handle the organic wastes? It is generally wiser to wash and reuse equipment rather than single use.

As for menu changes, are not they best organised with users views considered? If Jamie Oliver can do it for communities in the US, maybe he needs to be asked about the menus?

Oh well.......it is the USA I guess.

Composting in Australia - More Action Needed

Breaking down the benefits of composting
Tuesday, 16 November 2010

A press release worth reading.......

Increasing the use of organic compost to intensive agriculture industries such as citrus could save 30% of irrigation water and deliver millions of dollars of extra income through increased crop yields to regions such as the Riverina as well as providing significant carbon abatement and sequestration opportunities for the nation, according to the Waste Management Association of Australia (WMAA).

CEO of the WMAA, Val Southam. believes greater investment in the utilisation of organic materials in agriculture may be part of the solution to restoring health to the Murray-Darling Basin without jeopardising the livelihoods of farmers and regional communities.“The economic and environmental benefits of composting are enormous. In addition to improving water use efficiency, there are significant environmental benefits accrued through carbon abatement and sequestration.

Organic material diverted from landfill could abate 2 million tonnes of CO2 equivalent every year- approximately 461,893 cars off the road annually.

“Around 420,000 tonnes of compost is used in our intensive agricultural industries per year. Compost improves soil condition by adding organic matter, and a 5% increase in soil organic material will result in the quadrupling of a soil’s water holding capacity. It also suppresses weed growth thus reducing the need for chemicals.” Southam said composting also prevents the loss of valuable top soil and reduces the damaging effects of erosion - savings of between 2.3 and 17 tonnes per hectare of soil loss due to erosion can be achieved. “Our industry is calling on all levels of government to provide R&D funding to fully evaluate the economic and environmental benefits of composting and fund programs which promote awareness of the benefits of compost use in our agricultural industries and wider community,” she said.

Chair of Compost Australia (a division of WMAA), Peter Wadewitz believes there’s much more government, industry and the community can do to increase the use of compost. “At least 20 million tonnes of organic material is available for recycling through composting. Composting organic material such as cardboard and food scraps can reduce the amount of waste going to landfill by as much as 50%. “The Recycled Organics Industry is already processing over 5 million tonnes of organic material annually but the benefits to our environment and economy from increasing this amount are significant,” Wadewitz said. “In addition to increased R&D funding and raising awareness of the benefits of composting, one option may be to establish tax incentives for producers of recycled organic products in more sustainable agricultural production systems,” he added.

Compost for Soils reported that SARDI (South Australian Research and Development Institute) citrus trials (composted green organics, grape marc, animal manure) showed a positive return on the initial investment.An application of 40 m3ha-1 of composted green organics in Loxton North produced the highest benefit at 5.38 – that is, for every dollar invested around $5 is returned to the grower.

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While this information is not new, in our current debate about carbon, and improved productivity in Australian agriculture, this is a very timely press release and should be heeded around the country.

There is so much wasted food and recyclable organics available. There is technology available to do a lot more, from very simple systmes to quite complex operations. Other countries see this as a valuable resource for agriculture, yet we in australia with relatively poor soils and low moisture holding capacity in soils, really do need this material to improve productivity of the land.

And that applies especially so in the tropics, with higher temperatures driving a faster turnover of the soil carbon as well as a faster soil moisture cycle........and even poorer soils in general.

There are structural issues, with local government [or their contractors] often the handler of organic wastes, yet it must have better leadership at State or National level to achieve serious change.

Yes, there are skilled people that could achieve more.........let there be some action along the lines proposed in terms of R and D!!

Erosion and Sediment Control with Recycled Organic Waste - Berms

The following is very pertinent to the Top End of the NT today, as we experience a major 100mm per hour storm across the Dariwn region.

Where is your soil going today??

Erosion and sediment control, particularly on civil construction sites often seems to start and end with using a silt fence.

While silt fences can be effective, to be so, they require correct installation, and ongoing maintenance. While there are machines to install silt fencing [yes, they do exist!] rarely have I seen one in Australia, and especially on smaller civil works sites, they are, as they say, as rare as hen’s teeth!

Installing a silt fence is a tedious job, particularly the preparation of the footings, in which a lower area is buried, as well as refilling the trench. Mostly, and somewhat sadly, it is often done poorly, and the silt fence is often relatively ineffective.

In Australia with high summer storm rains, and especially so in the tropics, it is quite common to see a silt fence struggle with high rainfall intensity, and they sometimes breach. There are other options that can be simple and easy to install, and repair if necessary.

Top among the options is using a mulch or compost berm or contour bank. Many regions have mulched green waste available, and creating a berm is relatively simple using readily available on site equipment such as a bobcat or small backhoe. Accessing the greenwaste is often through the local council, or sometimes even using on site available cleared green materials can be useful too.
Ideally, pasteurised mulch is the preferred material, with coarse materials suitable. Ground woody waste, even small woody branches are usable. However, where pasteurised mulch is NOT available, unpasteurised mulch can do, although there will be a need to spray and kill any weeds that emerge within the berm – glyphosate is the normal option. Plants developing from the pasteurised mulch are very slow to almost none, although a few plants might be expected from blown in seeds, after a while.

There are some excellent resources on line, but the simple plan is to develop several berms across a slope, on the contour. They should be lightly keyed into the ground, often by building on a ripped base area or similar simple disturbance. Unlike an earth bank, they are supposed to be porous........just that all the water does not flow through at once, and sediment is collected and deposited along the way.

More information here:
http://www.caes.uga.edu/Publications/displayHTML.cfm?pk_id=6296 from Georgia in the US; a sub tropical region of the US

http://www.deq.state.or.us/wq/stormwater/docs/nwr/ephcompost04.pdf

http://cfpub.epa.gov/npdes/stormwater/menuofbmps/index.cfm?action=factsheet_results&view=specific&bmp=119 - a very comprehensive overview of berm use and construction

http://www.creativeearth.net/stormwater.html - shows how to build a system


When the project is completed, the berm can then be used as part of the organic materials often used on site as part of the landscaping, or often left in place in small drainage lines to continue to function until there is improved cover on the nearby soil areas.

They work extremely well, are cheap to construct and maintain, and VERY environmentally friendly!