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By D.K. Pal

This ebook discusses the best way to observe the elemental ideas of pedology to the tropical soils of the Indian subcontinent, with an emphasis on how one can improve crop productivity.

The ebook showcases the learn contributions on pedology, geomorphology, mineralogy, micromorphology and weather switch amassed from the literature on 3 significant soil forms: shrink-swell soils, crimson ferruginous (RF) soils and the soils that take place within the tropical environments of the Indo-Gangetic Plains (IGP). It additionally presents insights into numerous elements of 5 pedogenetically vital soil orders like Alfisols, Mollisols, Ultisols, Vertisols and Inceptisols present in tropical Indian environments.

Documenting the importance of minerals in soils and their total impact in soil technological know-how by way of pedology, paleopedology, polygenesis and edaphology, it offers a data base that's severe whilst trying to bridge the distance among meals construction and inhabitants development.

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Extra info for A Treatise of Indian and Tropical Soils

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1 Clay Illuviation in Vertisols: An Example of Proanisotropism Earlier reviews of the past research work (Ahmad 1983; Murthy et al. 1982) explained that the distribution of clay is uniform throughout Vertisols because haploidisation within the pedon caused considerable pedoturbation (Mermut et al. 1996). But some studies reported that in selected cases, there is a gradual increase in clay content with depth (Dudal 1965); although, it was thought that the increase in clay content with depth is due to inheritance from parent material (Ahmad 1983).

Although the peak-shift analysis (Wilson 1987) is a useful method to determine the smectite content in Sm– K, it becomes ineffective when the smectite component in Sm–K is highly chloritised and the swelling of smectites on glycolation is restricted. To circumvent this problem, the chemical method of Alexiades and Jackson (1965) is an effective way to quantitatively determine the smectite content in soil clays and thus, Shirsath et al. (2000) observed a strong relationship between marked shrink–swell properties and smectite content in the clay fraction (<2 μm).

These data suggest that Vertisols in India and elsewhere are developed during the Holocene period. 3 2 Cracking Clay Soils (Vertisols): Pedology, Mineralogy … Smectite Clay Minerals in Vertisols: Recent Initiatives for Their Proper Characterization To establish a link between smectitic mineralogy and important bulk properties of Vertisols especially their shrink-swell characteristic, often becomes difficult because on many occasions the description of smectitic minerals is inadequate or incomplete.

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