Effect of cobalt and Rhizobium on yield, oil content and nutrient concentration in irrigated summer groundnut (Arachis hypogaea)

Jana, P.K.; Karmakar, S.; Ghatak, S.; Barik, A.; Nayban, A.; Sounda, G.; Mukherjee, A.K.; Saren, B.K.

Indian Journal of Agricultural Sciences 64(9): 630-632


ISSN/ISBN: 0019-5022
Accession: 002600569

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In field trials in 1986 and 1988 on sandy loam soil at Kalyani, West Bengal, groundnut cv. JL 24 seeds were inoculated with Rhizobium and/or treated with 1 p.p.m. cobalt sulphate or the crop was given an application of 25 mg cobalt sulphate/msuperscript 2. Seed yield was increased by all treatments compared with the untreated control. Seed yields were lower with soil-applied cobalt sulphate (1.52 t/ha) than with the other treatments (1.72-1.77 t/ha). Seed oil and protein contents were highest with a combination of Rhizobium + cobalt sulphate seed treatments (47.1 and 28.5%, respectively). Seed N, P and K contents were increased in all treatments compared with the control.