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481.

When the movement of water after rain or irrigation after 48-72 hours, the soil is said to be at:

A.	Incipient wilting	B.	Field capacity
C.	Permanent wilting	D.	None of these

482.

The organisms involved in herbicide detoxification include:

A.	Earthworms	B.	Nematodes
C.	Algae	D.	None of these

483.

The origin place of potato is:

A.	China	B.	Russia
C.	Germany	D.	South America

484.

The pH range for successful cultivation of maize ranges from:

A.	6.5-8.5	B.	7.5-8.5
C.	7.5-9.5	D.	5.5-7.5

485.

The pH range suitable for soyabean cultivation is:

A.	5.0-6.0	B.	7.0-8.5
C.	5.5-6.5	D.	6.0-7.5

486.

The Phalaris minor can be controlled by using the weedicide called isoproturon at _____ kg a.i/ha depending upon soil type:

A.	0.1-1.00	B.	0.75-1.25
C.	1?2	D.	2?3

487.

The place of origin of blackgram is:

A.	Afghanistan	B.	India
C.	Bangladesh	D.	Pakistan

488.

The planting of sugarcane by trench method:

A.	Improves germination	B.	Reduces lodging
C.	Improves tillering	D.	None of these

489.

The polish percentage in paddy is:

A.	2%	B.	4%
C.	6%	D.	8%

490.

The practice of growing four crops in a year from same piece of land in such a way that one crop is sown immediately after or just before the harvest of the previous crop is called as:

A.	Double cropping	B.	Relay cropping
C.	Intensive cropping	D.	Multiple cropping