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41.

Adsorbed Ca++, Mg++ or A1++ may encourage soil aggregate formation starting with a process called:

A.	Flocculation	B.	Exfoliation
C.	Soil solrization	D.	None of above

42.

Aeolian deposit are formed by the transportation of materials through:

A.	Running water	B.	Wind
C.	Sea	D.	Ice

43.

Alfisol soils are mostly ______ in respect of their fertility and are used either as crop land or forest or range land:

A.	High	B.	Medium
C.	Low	D.	Extremely low

44.

Alkali soils are generally found in:

A.	Sub-humid climate	B.	Arid and semi-arid climate
C.	Temperate climate	D.	None of these

45.

Zinc deficiency occurs in crops growing in soils having high phosphorous:

A.	Light soils	B.	Calcareous soils
C.	Soils low in phosphorous	D.	Soil having pH 7.5

46.

All potassium fertilizers are physiologically alkaline, there reactionwith soils is:

A.	Acidic	B.	Alkaline
C.	Neutral	D.	None of the above

47.

Wind laden with soil particles cembodies the abrasive action, which is:

A.	Greatly increased	B.	Greatly decreased
C.	Absolutely unaffected	D.	None of these

48.

Alluvial soils are rich in:

A.	K2O, P2O5 and Lime	B.	N
C.	Fe, A1	D.	Si, Cu

49.

Ammonia lost through volatilization in significant quantities from:

A.	Alkaline soils	B.	Acidic soils
C.	Saline soils	D.	None of these

50.

Ammonium and potassium ions are apparently just the right size to fit into the cavities between the crystal units of:

A.	Kaolinite	B.	Montmorillonite
C.	Vermiculite	D.	None of these