Influence of Different Organic Manures on Yield and N Use Efficiency of Rice

An exploratory field experiment was conducted to study the effective combination of organic and inorganic N on the availability and uptake of N and yield of rice in a black clayey soil with a long duration variety CRl009. Application of 25 per cent organic N as basal and 75 per cent inorganic N as top dressing enhanced the availability of N in soil, thereby, induced the N uptake and augmented higher rice yield. Among the organic sources, easily degradable green manures Sesbania rostrata and Sesbania aculeata were found to be the best choice to improve crop productivity and soil health in the said combination. Ipomea cornea, a non-conventional green manure, can also be thought of as an alternative for the above green manures owing to its easy availability and cheap cost.