41.
Instrument used to evaluate soil crust strength is

42.
Permafrost is a layer where soil temperature is always

43.
It has been observed that soil pH increases in

44.
Saline soils comes under which soil group as Zonality concept?

45.
Aspergillus niger test is used for

46.
SSP can have an edge and DAP in the soil is

47.
Leaching requirement can be estimated by formula

48.
In determination of moisture equivalent, centrifugal force used . . . . . . . . times of gravity.

49.
A subsoil includes

50.
Most suitable form of N for flooded rice soil is

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