National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692 Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
In a pot culture experiment, the response of French bean (Phaseolus vulgaris L.), cv. Contender to phosphorus (P) was studied on 20 acidic paddy soils of Thoubal district, Manipur. All the collected soil samples were acidic in reaction varied from 4.61 to 6.26 with mean value of 5.48, organic carbon content 9.9 to 24.1 g kg-1, CEC 9.21 to 35.71 [cmol (p+)kg-1] and clay content ranged from 24.78 to 73.38 per cent. Addition of P fertilizer in the soils significantly increased the dry matter production and P uptake by the crop. The critical limit of the soils varied from 10.0 to 23.6 kg P2O5 ha-1 depending upon the method of P extraction. Bray P1 method showed the highest degree of correlation than other extractant used with dry matter yield (r=0.702**), P content (r=0.578*), P uptake (r=0.688**), Bray’s per cent yield (r=0.679**) and Bray’s per cent uptake (r=0.629**). Thus, the critical levels of P in soils and 40 days old French bean plants below which response to P fertilization may be expected are 21.2 kg P2O5 ha-1 and 0.29 per cent P, respectively.
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