Effect of sulphur, zinc, and iron on chlorophyll content, yield, protein harvest, and nutrient uptake of French bean (Phaseolus vulgaris L.)

Abstract

Field experiments were initiated to investigate the effects of sulphur, zinc and iron on chlorophyll content, yield, protein harvest and NPK uptake in french bean at the Research Farm, Banaras Hindu University, Varanasi (India). Four main plot treatment combination each of sulphur (0 and 5 ppm) and zinc (0 and 5 ppm) with three subplot iron treatments (0, 2.5, and 5 ppm) were laid out in a split plot design replicated three times. Iron at 2.5 ppm significantly increased grain weight/plant. The result indicate that added iron could increase the yield of french bean grown on high pH soils which are continuously cropped under intensive rice‐wheat and fertilized with high analysis fertilizers. Sulphur, zinc, and iron failed to initiation nodulation in the crop possibly either due to the added nitrogen or due to some unknown non‐conducive factors.