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Environmental effects on agronomic characters and their developmental stabilities in rice (Oryza sativa L.). I. The differences in mean values, variations within plant and between plants of agronomic characters in different plant densities and crop seasons


, : Environmental effects on agronomic characters and their developmental stabilities in rice (Oryza sativa L.). I. The differences in mean values, variations within plant and between plants of agronomic characters in different plant densities and crop seasons. Journal of the Agricultural Association of China (118): 48-61

In the 2nd rice crop in 1978 and the 1st crop in 1979, 12 indica and 12 japonica rice were grown at spacings of 25 X 25 cm, 25 X 12.5 cm and 25 X 6.25 cm. Grain yield and most agronomic characters differed significantly between crop seasons and densities, with density having a greater effect than season. Most characters were higher in the 1st season than in the 2nd season, but panicle length, spikelet number and 100-grain wt. were not different or higher in the 2nd crop.

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