Analysis of Grain Production in Rice Plant : V. Analytical studies on the varietal tolerability for heavy manuring in paddy rice

Abstract

Rice varieties much tolerable for heavy fertilizing with nitrogen, Fujisaka, No. 5 and Ginmasari (former early var., later medium var.), and non-tolerable varieties, 0banasawa, No.1 and Norin, No.21 (former early var., later medium var.) were grown under low, medium and high nitrogenous nutrient levels respectively, and the factors constituting field photosynthetic ability, respiration and dry matter productivity of those were studied