2.1 To investigate biochemical composition of labile (dissolved organic C and N) and stable pools of SOM at various storage sites in the soil matrix,
2.2 To further investigate roles of microbial communities and their functions in decomposition of contrasting quality organic residues with special emphasis on N and C transformation processes,
2.3 To further investigate roles of soil fauna in decomposition of contrasting quality organic residues,
2.4 To investigate carbon saturation in sandy soils after receiving continuous long term application of contrasting quality organic residues.
2.5 To investigate interactions of contrasting quality biochemical compounds, i.e., N-rich and C-rich labile compounds interacting with recalcitrant C compounds, rendered by microbial decomposition in soils as a basis for developing technology of residue mixing for soil fertility improvement.
2.6 To develop models for studying SOM accumulation and dynamics based on long-term data from the Research Groups long-term experiment.
