Abstract
A field experiment was conducted on cultivators field during the rainy seasons of 1986 and 1987 to find out the effect of single superphosphate, diammonium phosphate, gypsum and their mcde of application (full basal, full topdressing on foliage and half bmal+ half topdressing on foliage) on yield, oil and protein content of M 13 groundnut (Arachis hypogaea L.). Application of 60 kg P2C!,ha - through single superphosphate with 50 kg Sha through gypsum as full basal gave the maximum y~eld, oil and protein contents, which was on a par with single superphosphate @ 60 kg P20,ha full basal. Full - -?.- topdressing of phosphatic fertilizer and gypsum 60 days after sowing gave significantly lower yield than its conventional basal application. Single superphosphate was superior source of P to diammonium phosphate.
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