Question

In India, cotton is predominantly grown on 'Black Cotton Soils' (Vertisols). These soils are characterized by high swelling clay content (Montmorillonite), which leads to a unique microbial challenge during heavy rains?

A Rapid nitrification
B Severe oxygen depletion (anaerobiosis) due to waterlogging
C Immediate fixation of all available phosphorus
D Hyper-activity of denitrifying fungi
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