Abstract

in sandy loam soil top dressing of 500 kg/ha gypsum over a basal dressing of the recommended dose of NP at 30 days after sowing (DAS) coinciding with first flowers appearance increased significantly tost weight of pod and kernels, shelling outturn and pod yield of spanish groundnut cultivars JL-24 and TCG 1704 (Pre- release variety. Delayed application at 45 or 60 DAS decreased the pod yield. There was further yield reduction when gypsum was applied to the plant and car- thed up. Eventhough top dressing of 750 kg/ha of gypsum alone increased pod yield over on gypsum application, the increase was highest due to top dressing of 500 kolla with NP. Higher dose of gypsum at 1000 kg,ha depressed pod yield either with or without NP in both JL-24 and TCG 1704. The response of JL-24 and TCG 1704 per unit of gypsum was 6.95 and 6.53 kg of pods respectively The highest additional net return wos with NP and 500 kg/ha of top dressing of gypsum at flower appearance.

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