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A. Understand the various roles of compost on a farm
B. Have basic understanding of the processes involved
in decomposition
C. Learn how to make good compost pile and proper
application method
D. Understand the definition and importance of quality
“tilth” in soil
Anaerobic decomposition is the breakdown of raw
materials in the absence of oxygen and can be identified
by a distinct foul smell and a generally "slimy" feel.
Aerobic decomposition is the breakdown of raw
materials in which oxygen is present. This is the type of
decomposition that is relevant for composting.
Compost is the action and end result of decomposing organic materials in their raw form turning
into vitally important soil amendment that improves the overall quality tilth of soil.

Compost can be produced through the act of decomposing plant matter as
well as decomposing animal manure
Compost Ingredients

Watch a Video on Com
Recycles waste material on site
Adds large amounts of humus to soil

Humus is a brown or black complex variable material resulting from partial decomposition
of plant or animal matter and forming the organic portion of soil
Increases soil fertility and stabilizes elements such
as nitrogen

http://msucares.com/crops/soils/nitrogen.html
Hugely increases biological activity in the soil
Improves soil structure and ability to retain water or create
percolation of water through soil

http://www.nature.com/scitable/knowledge/library/soil-water-dynamics-59718900
Creates outlet for potentially harmful excess of raw
manure in animal based agriculture
Decomposers 3 levels of consumers (organisms that feed on each other and the organic matter).

3rd Level
Macro
organisms

2nd Level
Meso organisms

Level
Micro organisms
1st
Bacteria

Bacteria are the smallest living organisms and the most numerous in compost; they
make up 80 to 90% of the billions of microorganisms typically found in a gram of
compost. Bacteria are responsible for most of the decomposition and heat
generation in compost. They are the most nutritionally diverse group of compost
organisms, using a broad range of enzymes to chemically break down a variety of
organic materials.

Fungi

Fungi include molds and yeasts, and collectively they are responsible for the
decomposition of many complex plant polymers in soil and compost. In compost,
fungi are important because they break down tough debris, enabling bacteria to
continue the decomposition process once most of the cellulose has been exhausted.

Actinomycetes

Actinomycetes are organisms that resemble fungi but actually are filamentous
bacteria. Like other bacteria, they lack nuclei, but they grow multicellular filaments
like fungi. In composting they play an important role in degrading complex organics
such as cellulose, lignin, chitin, and proteins.

http://compost.css.cornell.edu/microorg.html
Micro-organisms

Bacteria

Bacteria

Bacteria are micro-organisms that aid in the
breakdown of carbonaceous material.
Performs more complex decomposition roles such as the
breakdown of cellulose.

Fungi binds free particulates together improving overall
soil structure.
Rotten tree trunk. The capacity of brown rot fungus to break down
the cellulose in wood led to its selection for sequencing in 2007, with
the goal of identifying the enzymes involved in the degradation
process and using the information to improve cellulosic biofuels
production. (Credit: © microimages / Fotolia )

http://www.sciencedaily.com/releases/2011/07/110714142139.htm
Micro-Organisms

Actinomycetes bind aggregates in pile through fungal
like gray growths

Actinomycetes, such as this Streptomyces,
give soil its "earthy" smell
Heat pile by CO2 respiration

In the process of composting, microorganisms break down
organic matter and produce carbon dioxide,
water, heat, and humus.
2nd Level Consumers (Meso-organisms)
Nematodes or roundworms: They are the most
abundant invertebrates in soil. Less than one
millimeter in length, they prey on bacteria, protozoa,
fungal spores and each other. Most nematodes in the
soil are beneficial
Fermentation mites or mold mites: These
transparent bodied creatures feed primarily on yeast
in fermenting masses or organic debris. They can
develop into seething masses over a fermenting
surface such as a winery, but are not pests in
compost.
Springtail: Along with nematodes & mites, they share numerical dominance among
soil invertebrates. They feed on fungi, nematodes and small bits of organic detritus.
They help control fungi.
http://collections.infocollections.org/ukedu/uk/d/Jii06be/3.5.html
3rd Level Consumers (Macro-organisms)
Most macro-organisms feed on earlier inhabitants of the compost pile. They’re
beneficial in their support of the food chain inside the compost pile. Worms are a
very important part of the macro-organism family found in the compost pile.

Worm castings are the end result
of organic matter that has been
processed by worms
They also aerate the compost mix, which
introduces more oxygen, which in turn helps
the pile finish faster and decompose more
thoroughly.
Carbon to nitrogen ratio is important to overall viability and
health of pile. Initial ration should originally be 30:1 by
weight
Manure, farmyard
(avg.)

14:1

Manure, chicken

7:1

Manure, cow

18:1

Manure, horse

25:1

Manure, human

6-10: 1

Manure, pig

8:1

Manure, poultry

15:1

Manure, sheep

8:1

Manure, steer

25.3:1

http://www.homecompostingmadeeasy.com/carbonnitrogenratio.html
http://www.weblife.org/humanure/chapter3_7.html
Video of Squeeze ball Test
http://www.outsidepride.com/blog/tag/composting/
A well-made compost
pile will go through
distinct three phases.
First, it will enter into
the mesophilic stage
(68-104 degrees
Fahrenheit). Second,
it will enter into the
thermophilic stage
(105-150+ degrees
Fahrenheit). Finally,
the pile will enter
into the maturation
stage (not indicated
on the graph).
http://www.compostjunkie.com/compost-thermometer.html
Video showing proper turning technique
Five to seven tons of compost per acre is a
generally acceptable rate of application for field
dispersal
 Intensive garden situations can use up to 10 tons
per acre

For a developed field, compost integration
should be no deeper than eight inches

8 in

18 in
Compost should be applied 3 times…
Tilth is the state of aggregation of soil and its condition for supporting plant
growth.

This refers to the general overall suitable nature of soil’s
capacity to grow and sustain cultivated plant life.
Compost is key to attaining a good soil structure and
maximum fertility. It is the foundation of organic
gardening.
Name several roles of compost on the farm.
 What types of organisms help the decomposition
process?
 Why is it important to turn a compost pile on a
regular basis?

• Recycles waste material on site
• Adds large amounts of humus to soil
• Increases soil fertility and stabilizes elements such as
nitrogen
• Hugely increases biological activity in soil
• Improves soil structure and ability to retain water or create
percolation of water
through soil
• Creates outlet for potentially harmful excess of raw manure in
animal based
agriculture
• Compost is a wonderful example of alchemy, changing waste
material into vitally important materials.
Bacteria
 Fungi
 Ace
 Meso & Macro-organisms

Turning the pile redistributes heat, biological
activity, and moisture content.
 Turning a pile can finish compost up to 10 times
faster than letting a pile sit unturned.



SOIL by Geoff Larsen



http://www.geofflawton.com/sq/15449-geoff-lawton, Jeoff Lawton



http://permaculturenews.org/2010/09/23/soils-dvd-availableoctober-2010/

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Compost, science behind it and the how and why of doing it

  • 1.
  • 2. A. Understand the various roles of compost on a farm B. Have basic understanding of the processes involved in decomposition C. Learn how to make good compost pile and proper application method D. Understand the definition and importance of quality “tilth” in soil
  • 3. Anaerobic decomposition is the breakdown of raw materials in the absence of oxygen and can be identified by a distinct foul smell and a generally "slimy" feel. Aerobic decomposition is the breakdown of raw materials in which oxygen is present. This is the type of decomposition that is relevant for composting.
  • 4. Compost is the action and end result of decomposing organic materials in their raw form turning into vitally important soil amendment that improves the overall quality tilth of soil. Compost can be produced through the act of decomposing plant matter as well as decomposing animal manure
  • 7. Adds large amounts of humus to soil Humus is a brown or black complex variable material resulting from partial decomposition of plant or animal matter and forming the organic portion of soil
  • 8. Increases soil fertility and stabilizes elements such as nitrogen http://msucares.com/crops/soils/nitrogen.html
  • 9. Hugely increases biological activity in the soil
  • 10. Improves soil structure and ability to retain water or create percolation of water through soil http://www.nature.com/scitable/knowledge/library/soil-water-dynamics-59718900
  • 11. Creates outlet for potentially harmful excess of raw manure in animal based agriculture
  • 12.
  • 13. Decomposers 3 levels of consumers (organisms that feed on each other and the organic matter). 3rd Level Macro organisms 2nd Level Meso organisms Level Micro organisms 1st
  • 14. Bacteria Bacteria are the smallest living organisms and the most numerous in compost; they make up 80 to 90% of the billions of microorganisms typically found in a gram of compost. Bacteria are responsible for most of the decomposition and heat generation in compost. They are the most nutritionally diverse group of compost organisms, using a broad range of enzymes to chemically break down a variety of organic materials. Fungi Fungi include molds and yeasts, and collectively they are responsible for the decomposition of many complex plant polymers in soil and compost. In compost, fungi are important because they break down tough debris, enabling bacteria to continue the decomposition process once most of the cellulose has been exhausted. Actinomycetes Actinomycetes are organisms that resemble fungi but actually are filamentous bacteria. Like other bacteria, they lack nuclei, but they grow multicellular filaments like fungi. In composting they play an important role in degrading complex organics such as cellulose, lignin, chitin, and proteins. http://compost.css.cornell.edu/microorg.html
  • 15. Micro-organisms Bacteria Bacteria Bacteria are micro-organisms that aid in the breakdown of carbonaceous material.
  • 16. Performs more complex decomposition roles such as the breakdown of cellulose. Fungi binds free particulates together improving overall soil structure.
  • 17. Rotten tree trunk. The capacity of brown rot fungus to break down the cellulose in wood led to its selection for sequencing in 2007, with the goal of identifying the enzymes involved in the degradation process and using the information to improve cellulosic biofuels production. (Credit: © microimages / Fotolia ) http://www.sciencedaily.com/releases/2011/07/110714142139.htm
  • 18. Micro-Organisms Actinomycetes bind aggregates in pile through fungal like gray growths Actinomycetes, such as this Streptomyces, give soil its "earthy" smell
  • 19. Heat pile by CO2 respiration In the process of composting, microorganisms break down organic matter and produce carbon dioxide, water, heat, and humus.
  • 20. 2nd Level Consumers (Meso-organisms) Nematodes or roundworms: They are the most abundant invertebrates in soil. Less than one millimeter in length, they prey on bacteria, protozoa, fungal spores and each other. Most nematodes in the soil are beneficial Fermentation mites or mold mites: These transparent bodied creatures feed primarily on yeast in fermenting masses or organic debris. They can develop into seething masses over a fermenting surface such as a winery, but are not pests in compost. Springtail: Along with nematodes & mites, they share numerical dominance among soil invertebrates. They feed on fungi, nematodes and small bits of organic detritus. They help control fungi. http://collections.infocollections.org/ukedu/uk/d/Jii06be/3.5.html
  • 21. 3rd Level Consumers (Macro-organisms) Most macro-organisms feed on earlier inhabitants of the compost pile. They’re beneficial in their support of the food chain inside the compost pile. Worms are a very important part of the macro-organism family found in the compost pile. Worm castings are the end result of organic matter that has been processed by worms They also aerate the compost mix, which introduces more oxygen, which in turn helps the pile finish faster and decompose more thoroughly.
  • 22. Carbon to nitrogen ratio is important to overall viability and health of pile. Initial ration should originally be 30:1 by weight
  • 23.
  • 24. Manure, farmyard (avg.) 14:1 Manure, chicken 7:1 Manure, cow 18:1 Manure, horse 25:1 Manure, human 6-10: 1 Manure, pig 8:1 Manure, poultry 15:1 Manure, sheep 8:1 Manure, steer 25.3:1 http://www.homecompostingmadeeasy.com/carbonnitrogenratio.html http://www.weblife.org/humanure/chapter3_7.html
  • 25. Video of Squeeze ball Test
  • 27. A well-made compost pile will go through distinct three phases. First, it will enter into the mesophilic stage (68-104 degrees Fahrenheit). Second, it will enter into the thermophilic stage (105-150+ degrees Fahrenheit). Finally, the pile will enter into the maturation stage (not indicated on the graph). http://www.compostjunkie.com/compost-thermometer.html
  • 28.
  • 29. Video showing proper turning technique
  • 30. Five to seven tons of compost per acre is a generally acceptable rate of application for field dispersal  Intensive garden situations can use up to 10 tons per acre 
  • 31. For a developed field, compost integration should be no deeper than eight inches 8 in 18 in
  • 32. Compost should be applied 3 times…
  • 33. Tilth is the state of aggregation of soil and its condition for supporting plant growth. This refers to the general overall suitable nature of soil’s capacity to grow and sustain cultivated plant life. Compost is key to attaining a good soil structure and maximum fertility. It is the foundation of organic gardening.
  • 34. Name several roles of compost on the farm.  What types of organisms help the decomposition process?  Why is it important to turn a compost pile on a regular basis? 
  • 35. • Recycles waste material on site • Adds large amounts of humus to soil • Increases soil fertility and stabilizes elements such as nitrogen • Hugely increases biological activity in soil • Improves soil structure and ability to retain water or create percolation of water through soil • Creates outlet for potentially harmful excess of raw manure in animal based agriculture • Compost is a wonderful example of alchemy, changing waste material into vitally important materials.
  • 36. Bacteria  Fungi  Ace  Meso & Macro-organisms 
  • 37. Turning the pile redistributes heat, biological activity, and moisture content.  Turning a pile can finish compost up to 10 times faster than letting a pile sit unturned. 
  • 38.  SOIL by Geoff Larsen  http://www.geofflawton.com/sq/15449-geoff-lawton, Jeoff Lawton  http://permaculturenews.org/2010/09/23/soils-dvd-availableoctober-2010/