21. Area (Mha) under chemical degradation in india is
22. Soils are categorized as 'Heavy soil' or 'Light soil' in which aspect?
23. Cryptogamic crust is formed by
24. Lime recommendation is made on the basis of a . . . . . . . . inch furrow slice
25. 'Peat' soil are generally characterized as
26. N/S ratio is wider in case of
27. Which element is indirectly related with drought resistance
28. Specific Humidity is measured by
29. Which element is the only non-metal among the micronutrients
30. Which one of the following sets shows the correct soil order in sequence of increasing age
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