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São relatados os resultados de três ensaios de adubação de arroz de sequeiro, com o cultivar 'Dourado Precoce'. O esquema estatístico foi o fatorial 3 X 3 X 3 para N, P e K, com um tratamento extra de micronutrientes. Os ensaios foram localizados na variação Lins, dos solos Podzolizados de Lins e Marília. Em duas localidades houve efeito para a adubação nitrogenada. A dose de 30 kg/ha de N foi suficiente para o máximo efeito. A adubação fosfatada proporcionou a maior produção com 60 kg/ha de P2O5, em dois casos. No terceiro, esta foi alcançada com 120 kg/ha. O potássio e a mistura de micro-elementos não trouxeram acréscimos significativos na produção. This paper deals with three fertilizer experiments with upland rice, in which the cultivar 'Dourado Precoce' was used. The scheme used was a factorial 3 X 3 X 3 with an extra treatment for micronutrients and the experiments were installed on Podzolized soils on Calcareous Sandstone Lins variation. In the choice of the places, special consideration was given to the e.mg PO4-3 /100g of soil content. Nitrogen affected the production in two places. 30 kg/ha of N was sufficient. Phosphorus affected the production in the three places. The level of 60 kg/ha of P2O5 was sufficient in two places and in the third, the level of 120 kg/ha of P2O5 was necessary. Potassium and micronutrients did not affect the production of rice

Ensaios preliminares de adubação do arroz de sequeiro: III - Cultivar 'Dourado Precoce'