A split-plot arrangement of treatments in
a RCBD (randomized completed block design) was used, with pre-rice mungbean or fallow
with weeds incorporated into the soil in main plots, and cattle manure at four rates (0;
3,125; 6,250; 9,375 kg/ha) as subplots. Incorporation of mungbean residue into the soil
provided 3.2 t of dry matter per ha containing 50.2 kg N, 9.8 kg P and 166.2 kg K per ha.