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551.

The sunflower crop requires cool climate from:

A.	Germination to seedling stage	B.	Seedling to flowering stage
C.	Flowering to maturity stage	D.	Seedling to maturity stage

552.

The surfaces on which phosphate ions enter into sorption reactions are:

A.	Surfaces of constant charge	B.	Surfaces of variable charge
C.	None of these	D.	Both of these

553.

Wheat is of:

A.	Mediterranean origin	B.	Pakistani origin
C.	Mexican origin	D.	Chigese origin

554.

The temporary roots in maize root system are:

A.	Seminal roots	B.	Aerial roots
C.	Crown roots	D.	Coronal roots

555.

The tendency of the young upper leaves to remain as the lower leaves yellow or die is an indication of nitrogen ____ in the plant.

A.	Mobility	B.	Immobility
C.	Stability	D.	Degradability

556.

The term 'Cropping scheme' refers to:

A.	Allotment of crops to the pieces of land on a farm	B.	Allotment of crop rotations to the pieces of land in a farm
C.	Planning and budgeting of the crop production in a farm	D.	Planning of schedules for different farm operations

557.

Wheat germination (90%) taken place after how many days?

A.	3?4	B.	4?5
C.	5?6	D.	4?8

558.

What will happen if the wheat applied with the more nitrogen in standing crop?

A.	It will became green	B.	The grain will be small in size
C.	It will lodge	D.	No effect

559.

The total soluble iron concentration becomes sufficient to supply iron adequately to roots only at pH:

A.	2	B.	3
C.	4	D.	5

560.

The twinning in sugarbeet crop should be done at the stage of:

A.	5 week age	B.	2 week age
C.	8 week age	D.	10 week age