Effects of calcium sources on physiological traits related to pod and seed yield of peanut

Abstract

Gypsum is an important calcium source in peanut production system as calcium is required for pod and seed filling to attain acceptable pod yield. Other sources of calcium may be used as gypsum substitutes in case they are available at low cost or free available. Calcium sources were significantly different for crop growth rate (CGR), pod growth rate (PGR), total dry matter at 65 and 92 DAP, and seed yield at harvest. Crop growth rate during planting to 65 DAP was significantly related to pod yield with R2=0.56∗∗. Pod growth rates during 65 to 92 DAP and 92 to 125 DAP were significantly related to pod yield with R2= 0.35∗∗and 0.54∗∗, and also related to seed yield with R2= 0.29∗and 0.57∗∗, respectively.