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151.

Growing of a crop after the failure of main crop is called:

A.	Cash crop	B.	Cover crop
C.	Catch crop	D.	None of these

152.

Which one of the following parts of the tobacco plant synthesizes nicotine?

A.	Root	B.	Stem
C.	Branch	D.	Leaf

153.

What does 'jhuming' mean?

A.	A type of farm machine	B.	A type of improved seed
C.	Convential method of cultivation in hilly tracts	D.	A type of fertilizer

154.

Heavy rainfall or irrigation during fruiting periods of cotton may cause:

A.	Lodging of crop	B.	Shedding of flowers and young bolls
C.	Yellowing of your bolls	D.	Heavy incidence of bollworm

155.

Herbicide is a chemical, which used to:

A.	Destroy weeds	B.	Destroy crops
C.	Destroy weed and crop both	D.	None of the above

156.

Herbicide used for weed control in sorghum is _____ kg a.i./ha:

A.	Atrazine at 0.5 - 5 - 1.0	B.	Atrazine at 1.25 - 1.5
C.	Basalin at 0.5 - 1.0	D.	Basalin at 1.25 - 1.5

157.

Heteromorphic seeds of the plant families asteraceae and chenopodiaceae do not permit _____ exchange:

A.	Water	B.	Chemical
C.	Gaseous	D.	Light

158.

High humidity is harmful to field pea as it accentuates:

A.	Incidence of insects	B.	Excessive vegetative growth
C.	Incidence of disease	D.	Delays flowering

159.

High temperature above 41?C flowering of castor results in:

A.	Rotting of pollens and poor fertilization	B.	Blasting of flower and poor seed-set
C.	Delayed pollination and poor-fertilization	D.	Reduced pollination and rotting of seed

160.

Which one of the following chemicals is used to treat seed potato to break its dormancy?

A.	Ethrel	B.	Thiourea
C.	IAA	D.	NAA