GROUNDNUT AND ITS SOILS UNDER NAGARJUNASAGAR LEFT COMMAND IN ANDIIRA PRADESH,’INDIA
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Date
1994
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Professor Jayashankar Telangana State Agricultural University
Abstract
arjunasagar left command
in Andhra Pradesh,India" was conducted during rabi 1993—94 in order to identify, if possible, the constraints that might be affecting the crop growth. Both soil and index leaf samples of groundnut crop were collected from 50 fields at random,spread over in 19 villages in Khammam and Nalgonda districts under the Nagarjunasagar left command. Soil and plant samples collected were analysed through standard methods. The soils were observed to be light in texture, non saline and neutral to alkaline in reaction. Soil analysis showed the occurrence of deficiencies of N (12%), P (40%), K (12%) and S (30%). The deficiency of . Zn among the micronutrients was extensive (38 per cent). Tron was observed to be 10 per cent of the samples which was observed to be increase as compared to earlier study. Analysis of index leaf samples showed the deficiencies of one or other nutrient nhf as high as 82 percent of the samples. Mostly two or more nutrients were observed Ito be simultaneously deficient in the samples, limiting the crop growth. The manurial practices being observed to be grossly inadequate either to correct the deficiencies in the soil or to meet the crop requirements. wide variation in the manurial practices was noted. The ' N applied ranged from 0 kg N ha_1 to 160 kg N ha—1 with a mean 0' 45 kg N ha—1 ngajnst the recommended dose of 40 kg N ha‘ . Phosphorus was applied in 84 per cent of
the fields in the range of O to 135 kg P20 with a mean of 44 kg P205 ha 1. As high as 26 per cent 0 fields did notreceive any : K application. Despite wide spreadoccurrence of ' deficiency] not even single farmer applied Zfil 0 Application of ' P‘ 4 through snporphosphato and gypsum were observed to partly meet the. 5‘ : requirement of crop th ough inadequately basing on the soil analysis and composition of the index leaf andmanurial., practices. Rationalisation of N, P, K, S, 2/: r‘am'cmm"application of gypsum to meet the . 5 ‘needs and correct the soil alkalinity;and correction of Zn Fecml Mn deficiency were recommended for successful cultivation of groundnut in the study area.
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D4505