Nitrogen and phosphorus requirements of rice grown after wheat and field pea

abonos fosfatados abonos nitrogenados application rates composition globale crop yield dose d'application fosforo nitrogen content nitrogen fertilizers oryza sativa phosphate fertilizers phosphore phosphorus pisum sativum potasio potassium proximate composition rendement des cultures rendimiento de cultivos rotation culturale rotational cropping superfosfato superphosphate teneur en azote triticum aestivum urea uree