Effect of plant population on grain yield, production and distribution of dry matter in bean (Phaseolus Vulgaris)
1975
Enyi, B.A.C., Faculty of Agriculture, University of Dar es Salaam, Tanzania
The influence of varying plant density on growth and yield of bean variety, CanadianWonder, was investigated during the 1972 growing season. Total crop dry matter and leaf area index increased with increase in plant density. Grain yield per hectare at final harvest increased by about 27, 50 and 48% respectivelyand pod number per hectare increased by about 24, 57 and 99% respectively when plant population was increased from 74 to111, 222 and 444 thousand plants per hectare.The ratio of stem to pod weight at final harvest decreased with increasing plant density. Mean crop growth rate increased with increasing plant density but net assimilation rate and relative growth rate decreased with increasing plant density. The quantity of light intercepted increased with the increase in leaf area index and net assimilation rate decreased with the increase in the amount oflight intercepted by the upper leaves. Harvest index was higher at low than at high plant densities. Introduction
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