Physiological Types of Bacteria in Different Soil

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Soil Microbiology Nature of Soil Soil Habitats (Lithosphere) Microorganisms in Soil Decomposition of Organic Matter in Soil Bacteria in Soil Physiological Types of Bacteria in Different Soils Fungi in Soil Protozoa in Soil Algae in Soil Viruses in Soil Functions of Microorganisms in Soil Humus Functions of Humus Cycles of Elements Carbon Cycle Nitrogen Cycle

Physiological Types of Bacteria in Different Soil

	Physiological Types of Bacteria in Different Soil There are different types of parent materials of rocks available for the formation of soil. Granite is slow to weather limestone, sandstone or shale. The nature and chemical composition of the parent material have a direct bearing on the fertility of soil. For instance, soils derived from granite or sandstone are not as fertile as those derived form limestone.
Broadly, speaking, there are six soil zones in the world-the tundra soils having dwarf shrubs and mosses in very cold regions of the world, the podzolic soils of humid temperate forests, the chernozemic soils of subhumid, semi-arid temperate climates, the desertic (arid) soils of arid, temperate and tropical climates, the latsolic soils of humid and wet or dry tropical and sub-tropical climates and the stony mountain soils which may have any one of the above characteristics.
Each soil zone or belt may consist of many soil types which can be clubbed into various soil groups depending on fertility, tilth, ability to hold water and resistance to erosion. In India, approximately 25 soil types are recognized.
Among them those which have been extensively studied are the red soils, the laterite soils, the black soils and the alluvial soils. Besides these types, nearly 14% of the total area of soil in India is occupied by forest trees and hills and certain parts of India are characterized by desert conditions and alkalinity which render them unfit for cultivation.

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Sulphur Cycle Ammonification in Soil Nitrification in Soil Nitrate Reduction in Soil Denitrification in Soil Nitrogen Fixation Symbiotic Nitrogen Fixation Rhizobium Specificity of Bacteria and Legumes Non-Symbiotic Nitrogen Fixation Non-symbiotic Nitrogen Fixing Microorganisms Mechanism of Nitrogen Fixation Oxidation of Sulphur and Sulphur Compounds by Bacteria