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311.

Single super phosphate (SSP) contains:

A.	20% P2O5	B.	16 to 18% P2O5
C.	20 to 25% P2O5	D.	10 to 46% P2O5

312.

Single super phosphate (SSP) is manufactured from:

A.	Rock phosphate	B.	Di-calcium phosphate
C.	Bone meal	D.	None of the above

313.

Single super phosphate is preferred for phosphorus application in groundnut because it also provides:

A.	Sulphur	B.	Calcium
C.	Sulphur and calcium both	D.	None of these

314.

Slow nitrification rate of non-edible mahua cake is due to:

A.	The presence of oil	B.	Wide C/N ratio
C.	Low N2 content	D.	The presence of certain alkaloids

315.

Sodic soils contain sufficient amount of ______ to interfere with plant growth:

A.	Exchangeable calcium	B.	Exchangeable sodium
C.	Exchangeable potassium	D.	Exchangeable magnesium

316.

Sodium nitrate contains:

A.	18% nitrogen	B.	24% nitrogen
C.	16% nitrogen	D.	28% nitrogen

317.

Soil air contains:

A.	0.25% CO2	B.	0.02% CO2
C.	2.5% CO2	D.	3.0% CO2

318.

Soil colour determination is standardized and determined by the comparison of the soil colour to:

A.	Tensiometer	B.	Gypsum block
C.	Munsell chart	D.	None of the above

319.

Soil formed under impeded drainage conditions, where movement of air and water is restructed is known as:

A.	Gley soil	B.	Acid soil
C.	Chernozem	D.	Podzol

320.

Soil is biochemically weathered part of:

A.	Bedrock	B.	Parent material
C.	Regolith	D.	Organic matter