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São apresentados resultados experimentais de adubação do arroz (Oryza sativa, L.) em solos irrigados de várzea do Vale do Paraíba. Foram estudados, em cinco níveis, os efeitos do nitrogênio em solos argilosos e os do fósforo em solos orgânicos. Aumentos significativos de produção, provocados tanto pelo nitrogênio como pelo fósforo, foram obtidos na maioria dos ensaios efetuados. A study was made on the effects of phosphorous and nitrogenous fertilization on rice (Oryza sativa) cultivated in flooded soils in the State of São Paulo (Brazil). Experiments for nitrogen were carried out in clayey lowland and for phosphorus, in organic lawland soils. A significant increase in production of rice was obtained either with nitrogenous or phosphorous fertilizer applications in most of the experiments

Efeitos das adubações nitrogenada e fosfatada em cultura de arroz, em condições de várzea irrigada