Phosphorus nutrition affecting upland rice yield in some Brazilian latosols International symposium on distribution, characteristics and utilization of problem soils

agricultural chemicals agronomic characters america application methods arroz arroz de secano brasil brazil cereales cereals cropping patterns crops cultivos cultivos de grano desarrollo estacional economic plants engrais environment environnement ferralsol ferralsoles ferralsols fertilizantes fosfatados fertilizers fosfatos genetic soil types grain crops inorganic compounds medio ambiente methode methods mode de culture phosphate phosphate fertilizers phosphates plantas plante plante de culture plants produit agrochimique rice riz riz de montagne sales salts seasonal development sel site factors soil types south america type de sol upland rice