Rapid Yield Loss of Rice Cropped Successively in Aerobic Soil

Upland rice ( Oryza sativa L.), commonly considered to be low yielding, can be high yielding if the genotype is improved for harvest index (HI) and the crop is grown relatively free from nutrient and drought stresses. We examined whether high and stable rice yields could be obtained in aerobic soil. In four experiments of 1‐ to 3‐yr duration, lime, N, and P were inputs for wet‐season upland rice ‘UPLRi‐5’ in a favorable rainfed Oxisol. In a 3‐yr...