Nutrient recycling and soil management in diversified lowland rice-based cropping systems

abonos npk abonos verdes aves de corral crop yield cropping systems cultivo de temporal culture pluviale cycling engrais npk engrais vert ganado grain legumes green manures leguminosas de grano livestock lowland manejo del suelo mise en valeur du sol npk fertilizers nutrientes nutrients oryza sativa poultry rainfed farming rendement des cultures rendimiento de cultivos sesbania rostrata sistemas de cultivo soil management substance nutritive tierras bajas volaille