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.
Keywords
Eggshell waste, FGD gypsum, Phosphogypsum, Pod growth rate
INTERNATIONAL JOURNAL OF AGRICULTURAL TECHNOLOGY
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