31. Example of neutral igneous rock is
32. Term 'Bioavailable' was coined by
33. A clay soil must contain at least . . . . . . . . Clay separate, to be designated a clay
34. The major nutrients are
35. Plasticity of soil can be determined by using
36. Consider the following statements. Cation exchange of soil colloidal clay is due to
1. Silicon tetrahedral layer
2. Isomorphous substitution
3. Hydration of clays
4. Broken edges of clay lattices
The correct sequence is
1. Silicon tetrahedral layer
2. Isomorphous substitution
3. Hydration of clays
4. Broken edges of clay lattices
The correct sequence is
37. Hill soils are generally
38. Ammonium nitrate contains
39. Rhizobium of alfalfa group is
40. Cereal straw is a particularly rich source of
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