A sequestration rate of 2.363t C/ha/yr was demonstrated where compost made of dairy manure and leaves was applied to fields in a three year rotation of corn-vegetable-small grain, with leguminous cover crops. The same rotation treated with chemical fertilizer instead of compost resulted in a net loss of -0.317t C/ha/yr.
Hepperly, Paul, et al, 2009, Compost, Manure and Synthetic Fertilizer Influences Crop Yields, Soil Properties, Nitrate Leaching and Crop Nutrient Content, Compost Science & Utilization 17:2, 117-126, https://www.tandfonline.com/doi/abs/10.1080/1065657X.2009.10702410.