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151.

For the determination of P by Bray method, the ratio of soil and solution should be:

A.	1;20	B.	1;100
C.	1;10	D.	1;25

152.

Force (dynes) acting on the surface of water at right angle is one cm of length is called:

A.	Cobersion	B.	Surface tension
C.	Adhesion	D.	None of these

153.

Formation of soil is the result of:

A.	Action of wind	B.	Chemical processes
C.	Bio-chemical processes	D.	Physical processes

154.

Fraction of organic matter comparatively resistant to microbial degradation is:

A.	Cellulose	B.	Protein
C.	Lignin	D.	Hemicelluloses

155.

Fungal population is comparatively high in a soil having:

A.	Acidic pH	B.	Neutral pH
C.	Alkaline pH	D.	Acidic to neutral pH

156.

General Soil Productivity Index (GSPI) can be calculated by:

A.	Sum of PRI's of major crops/Number of crops	B.	Sum of PRI's of major crops x 100/Number of crops
C.	Number of crops/Sum of PRI's of major crops	D.	None of these

157.

Gravitational potential in soil water is potential created due to:

A.	Soil solution	B.	Mass of the soil solids
C.	Presence of organic matter in soil	D.	Gravity

158.

Group of legume plant that develops nodules when exposed to bacteria nodules obtained from the nodules of any member of that plant group is known as:

A.	Symbiotic promiscuity	B.	Cross inoculation group
C.	Symbiosis	D.	None of the above

159.

Gypsum requirement of the soil can be determined by 344-N(A-B) in which N is equal to:

A.	Normality at EDTP	B.	Morality of EDTA
C.	Amount of EDTP	D.	None at the above

160.

Gypsum an amendment applied to alkali soil belongs to ______ type:

A.	Acid former	B.	Low solubility
C.	Soluble Ca-salt	D.	None of these