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King City, Mo | Good luck…..
Most of the gains in organic matter on soil tests are inconsistency in soil testing.
Sometimes that helps push an agenda.
Heres some old posts i had copied in my
Notes….
Soil organic matter
Nutrient Supply. Upon decomposition, nutrients are released in a plant-available form. While maintaining current levels. Each percent of SOM in the top 6 inches (15.2 cm) of a medium textured soil (silt and loam soils with a bulk density of 1.2) releases about 10-20 pounds of nitrogen, 1 to 2 pounds of phosphorus, and 0.4 to 0.8 pounds of sulfur per acre per year.
SOM - soil organic matter
An acre of soil 6 inches (15.2 cm) deep weighs approximately 2,000,000 pounds, which means that 1 percent SOM weighs about 20,000 pounds per acre. Under average conditions it takes at least 10 pounds of organic material to decompose into 1 pound of organic matter, so it takes at least 200,000 pounds (100 tons) of organic material applied or returned to the soil to add 1 percent stable organic matter under favorable conditions.
http://soils.usda.gov/sqi/assessment/files/OM_guide.pdf
2% SOM holds 32000 gallon of water or 21% of a 5.5" rain
5% SOM holds 80000 gallon of water or 53% of a 5.5" rain.
8% SOM holds 128000 gallon kif water or 85% of a 5.5" rain.
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Building organic matter
