An incubation experiment is carried out in the laboratory under controlled conditions to study the nutrient release pattern in soil as amended with organic and mineral fertilization. For this, bulk soil sample (0-15 cm) is collected where no fertilizer was applied. The organic manures viz., FYM, compost materials are applied according to field application rate. Suppose FYM field application rate 5 t/ha, FYM for incubation study is applied 2.5g/kg of soil. Same you can determine for plant residue for decomposition study.
Article Mineralization of Nitrogen, Phosphorus and Sulphur in Soil a...
please check the following references; it is very useful and it will help you
Garg, S. and Bahl, G.G. (2008) Phosphorus availability to
maize as influenced by organic manures and fertilizer
P associated phosphatase activity in soils. Bioresource
Technology 99, 5773-5777.
Biswas, D.R. and Narayanasamy, G. (2006) Rock phosphate
enriched compost: an approach to improve low-grade
Indian rock phosphate. Bioresource Technology 97,
2243-2251.
Biswas, D.R. (2011) Nutrient recycling potential of rock
phosphate and waste mica enriched compost on crop
productivity and changes in soil fertility under potato–
soybean cropping sequence in an Inceptisol of IndoGangetic
Plains of India. Nutrient Cycling in
Agroecosystems 89, 15-30.
Mr.Ajay,it would be better to apply organic materials on carbon (dry ) basis in incubation studies.This will help to better interpret the loss of carbon as CO2 on decomposition process.Carbon sequestration (gain) in carbon can also be computed if the organic materials are applied on carbon basis.
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