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371.

The capacity of soils to be moulded, that is to change shape in response to stress and peep that shape when stress is removed is termed as:

A.	Plasticity	B.	Stickiness
C.	Consistency	D.	Cementation

372.

The carbon nitrogen ratio in cultivated soil is stabilized as:

A.	20:1 to 30:1	B.	4:1 to 9:1
C.	18:1 to 19:1	D.	8:1 to 15:1

373.

The cation, which competes with ammonium during fixation, is:

A.	Potassium	B.	Aluminium
C.	Magnesium	D.	None of the above

374.

The CEC of kaolinite clay varies between:

A.	3 and 15	B.	16 and 40
C.	41 and 80	D.	81 and 100

375.

The cellulose content in humus is about:

A.	10%	B.	4%
C.	15%	D.	21%

376.

The characteristics of surface soil, which have important, bearing in soil management and crop production, is known as:

A.	Soil type	B.	Soil variant
C.	Soil series	D.	Soil phase

377.

The choice of a chemical amendment may be influenced by the _______ required for reaction in the soil:

A.	Time	B.	Cost
C.	Quantity	D.	Quality

378.

The colloidal surface area in the upper 15 cm of a hectare of a clay soil could be as high as km.

A.	700	B.	7,000
C.	70000	D.	700000

379.

The concentration of CO2 in the soil increases after the rains, probably because of:

A.	Increase nitrification and decomposition of organic matter	B.	Increases denitrification
C.	Increases leaching of nitrogen of CO2	D.	None of the above

380.

Gypsum is also called as:

A.	Kyarite	B.	Dolomite
C.	Salenite	D.	Baryte