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Épocas de semeadura da soja I. Efeitos na produção de grãos e nos componentes da produção

1983; Embrapa Informação Tecnológica; Volume: 18; Issue: 11 Linguagem: Inglês

1678-3921

João Nakagawa, Ciro Antônio Rosolem, M.S. Machado,

Growth and nutrition in plants

The aim of the present research was to study effects of planting dates on grain yield and it's components for three soybean cultivars Glycine max (L.) Merrill). The experiments were grown under field conditions of Botucatu, Sao Paulo State, Brazil (22o 51'S latitude and 48o 27'W.Gr. longitude) on a soil classified as 'Terra Roxa Estruturada. Soybean cultivars Parana, Santa Rosa and UFV-1 were sown fortnightly in six planting periods, starting in October, and repeated for three years (1977/78, 1978/79 and 1979/80). The following traits were evaluated: seed yield (kg/ha), number of pods per plant, percentage of normal pods, number of seeds of normal pods and weight of 100 seeds. Highest seed production were obtained on the second fortnight of October and during November sowing dates. Number of pods per plant and weight of 100 seeds were the yield components that were most affected by sowing dates.