Synchrony between N release from (15)N-foliarly-labeled tropical legume mulches and plant N uptake

eplacement of the natural fallow with shorter managed fallows that employ leguminous cover crops to enhance and accelerate the regeneration of soil fertility, especially N, and control weeds, may provide an alternative to traditional shifting cultivation in the humid tropics. The present study involved an attempt to identify an efficient method for the ;Nitrogen-15 recovery by Desmodium shoots was greater than Pueraria for all four application rates. Averaged over both species, maximum ;Averaged over the two species and summed over the corn-rice-corn rotation, crop recovery of the original...