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 |
Eight typical pedons namely Suryanarayanapuram (P1), Kallivettu (P2), Gajulapellore (P3), Kanamanambedu (P4), Kalathuru (P5), Thimmasamudram (P6), Chittathur (P7) and Brahmanapalle (P8) in western mandals of Srikalahasti division in Chittoor district, Andhra Pradesh were characterized for their physical and Physico-chemical properties and nutritional status of groundnut-growing soils. These pedons were shallow (P3), deep (P4, P7 and P8) and very deep (P1, P2, P5 and P6) and have Munsell colour notation of 10 YR / 7.5YR hue, with value 3 to 6 and Chroma 1 to 6. The dominant soil structure is fine to medium, weak to moderate and crumb to sub-angular blocky. Sand, silt and clay ranged from 48.21 to 82.78, 2.22 to 24.40 and 9.44 to 37.12 per cent, respectively in different horizons and bulk density varied from 1.26 (P1) to 1.60 Mg m-3 (P7). These soils were neutral to slightly alkaline in reaction (6.61 to 8.14). The CEC of the soils varied from 12.15 to 46.26 cmol (p+) kg-1 in different horizons. Calcium was found to be the dominant cations on the exchange complex. The soils low in organic carbon. The soils were low in available N, low to high in available P and K and sufficient in available S. The DTPA-extractable Zinc in groundnut-growing soils was sufficient in surface horizons and deficient in sub-surface horizons except in P5, P6 and P7 wherein it was found to be sufficient surface and subsurface horizons. The groundnut-growing soils were sufficient in DTPA-extractable iron, copper and manganese. Pedon 4 showed argillic (Bt) sub-surface horizon and was classified as Typic Haplustalf. Pedons 1, 2 and 6 showed cambic (Bw) sub-surface diagnostic horizon and were classified as Typic Haplustepts. Pedons 5, 7 and 8 did not exhibit any diagnostic horizon and were classified as Typic Ustorthent and Lithic Ustorthent (Pedon 3).
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