Effect of Seedling Numbers and Seedling ages on Yield and Growth of Japonica Rice

Abstract

Field experiment was conducted at Phitsanulok Rice Research center during dry season 1992 to determine the effect of seedling numbers and ages on yield and growth of japonica rice (var. Koshihikari) in thailand environment. A split plot design was used with seedling ages (20 - ,25-and 30-day-old) as the main plots and seedling numbers (1, 3 and 5 seedlings/hill) as the subjplots. Treatments were with 4 replications. Seedlings were hand trasplanted in 20x20 cm spacing. Fertilizer N (16-20-0) at 40 kg/rai was