compost mg notes for class 2011 jan 26 part 1
TRANSCRIPT
![Page 1: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/1.jpg)
Compost 101Linn Benton Master Gardeners
Lecture notes Part 1
Teresa Matteson
January 26, 2011
![Page 2: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/2.jpg)
![Page 3: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/3.jpg)
Woody paths
![Page 4: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/4.jpg)
Woody mulch
around
woody plants
![Page 5: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/5.jpg)
Compost turf with high Nitrogen amendment
Cover
One year
(be careful with cotton seed meal)
![Page 6: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/6.jpg)
Rate of decomposition depends on:
• Carbon to Nitrogen Ratio
• Air
• Water
• Size
• Time
![Page 7: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/7.jpg)
C:N Ratio
• Ratio of carbon to nitrogen– Analogous to carbohydrates (carbon) and
protein (nitrogen) in our food
– High carbon materials are BROWN– High nitrogen materials are GREEN
![Page 8: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/8.jpg)
C:N ratios• C always listed first,
grams C per gram N
25:1 or 25
• Lower C:N means
microbes need less N from soil
![Page 9: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/9.jpg)
Critical Values of C:N
• C:N < 25:1, N release to plants
• C:N > 25:1, N taken from soil –microbes out compete higher plants every time
![Page 10: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/10.jpg)
Organic material C/N
soil organic matter 10soil microbes 5-10alfalfa 13manure 20corn stover 57wheat straw 80sawdust 600
C:N ratio of different materials
![Page 11: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/11.jpg)
Manure Comparison
Manure C:N Moisture
Chicken 10 37 - 69
Cattle 16 81
Horse 30 72 (seeds)
Sheep 16 69
Pig 14 80 (parasites)
C:N
![Page 12: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/12.jpg)
Turn materials
Turn outside of pile to the center
so that all feedstocks
heat up
and smile!
AIR
![Page 13: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/13.jpg)
Alternative to turning - Aeration pipes
AIR
![Page 14: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/14.jpg)
Rule of thumb: 50% moisture
• Feels damp like a wrung-out sponge
• Should not drip when squeezed
WATER
![Page 15: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/15.jpg)
COVER the pile to control moisture
WATER
![Page 16: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/16.jpg)
Reduce sizeChopMowGrindChip
Increase
surface
areaSIZE
![Page 17: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/17.jpg)
Minimum: 1 cubic yard - 3’ x 3’ x 3’
Maximum: <4 ft wide by <9 ft tall As long as you want
Pile size matters
SIZE
![Page 18: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/18.jpg)
• It smells good, like the forest floor
• It is brown and crumbly
• The original materials cannot be identified
• It will pass through a ½” sieve toss overs back in the pile
When is your compost finished?4 criteria
TIME
![Page 19: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/19.jpg)
•It is brown and crumbly
•The original materials cannot be identified
TIME
![Page 20: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/20.jpg)
Make a ½ inch sieve that sits
on your wheelbarrow
Overs go back into the pile or
inoculate a new pile
![Page 21: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/21.jpg)
Free-form pile
![Page 22: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/22.jpg)
![Page 23: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/23.jpg)
![Page 24: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/24.jpg)
![Page 25: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/25.jpg)
![Page 26: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/26.jpg)
Build a hot pile
![Page 27: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/27.jpg)
Build a hot pile
6 “ coarse brown
![Page 28: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/28.jpg)
Build a hot pile
3” green
6” brown
![Page 29: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/29.jpg)
Build a hot pile
6” brown
3” green
Add soil, amendments & MIX
![Page 30: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/30.jpg)
![Page 31: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/31.jpg)
![Page 32: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/32.jpg)
![Page 33: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/33.jpg)
Expensive
Holds moisture
Turning?
![Page 34: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/34.jpg)
![Page 35: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/35.jpg)
![Page 36: Compost mg notes for class 2011 jan 26 part 1](https://reader036.vdocuments.net/reader036/viewer/2022070316/55566c14d8b42a144c8b4fa4/html5/thumbnails/36.jpg)