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- W2268784019 abstract "Black cotton soils occupy an area of 4,98,000 ha in Ramanathapuram, Tuticorin, Tirunelveli and Virudhunagar districts of Tamil Nadu. The basaltic parent materials have influenced the black soil formation (Soil Survey Staff 2003). Black cotton soils and associated black soils constitute a major soil group in India with the extend of 73.2 M ha (Vertisols) mainly under rainfed agro eco-system (Zade 2010). Despite high potential, these soils pose the problem of poor internal drainage caused by high clay content, ESP, EMP and pedogenic carbonate (Bhattacharyya et al. 2005). These soils are often difficult to cultivate, particularly for small farmers using handheld or animal drawn implements. Sub soil porosity and aeration are generally poor and roots of annual crops do not penetrate deeply. Farmers faced with these difficulties allow these soils to lie fallow for one or more rainy seasons (Pal et al. 2009). Scientific knowledge of soils, characterization and classification of these soils are essential for developing optimum land use plan for maximizing agricultural production. These soils differ greatly in their morphological, physical, chemical and biological characteristics. Since these characters control the productivity of crops, it is essential to have information about these characters of each soil. In the arid climatic environments the weathering of primary minerals contributes very little towards the formation of pedogenic carbonates (PC) as the prime chemical reaction that triggers the increase in pH, exchangeable magnesium and sodium on the exchangeable complex (Srivastava et al. 2002). Evaluation of crop suitability is a method of assessing the potential of soil for a crop of interest. Many international methods are in vogue such as land capability classification, Storie index (Storie 1933), Riequier’s index (Riquier et al. 1970) and Sys index (Sys et al. 1991). These methods have been applied for Indian conditions for different crops (Naidu and Hunsigi 2001; Tamgadge et al. 2002; Kadu et al. 2003). But the applicability of these methods under varying rainfall regimes needs investigation. Keeping in view, an attempt has been made to characterize, classify and evaluate the crop suitability for some black soils of southern Tamil Nadu." @default.
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- W2268784019 date "2015-11-29" @default.
- W2268784019 modified "2023-09-26" @default.
- W2268784019 title "Characterization, classification and crop suitability of some black cotton soils of southern Tamil Nadu" @default.
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