Hitting the seed with force against a hard surface to break seed dormancy is called _____?
A. Impaction
B. Abrasion
C. Stratification
D. Scarification
The value of regression and correlation is the same when the correlation between two variables is _____?
A. Imperfect
B. Perfect
C. Positive
D. Negative
A crop grown on residual moisture after harvesting rice is called ______?
A. Barani crop
B. Dubari crop
C. Ratoon crop
D. Sure crop
The given off water vapours from the surface of leaves is called ______?
A. Transpiration
B. Respiration
C. Exudation
D. Evaporation
Mg in plants act as _______?
A. Protein activator
B. Enzyme activator
C. Starch activator
D. None of the above
Tensiometer is used for measuring ______?
A. Soil moisture
B. Water pressure
C. Wind pressure
D. None of the above
The contact herbicides are less effective to _____?
A. Broad leaved weeds
B. Perenial plants
C. Seasonal plants
D. All the above
Two much Mg may create deficiency for ______?
A. P
B. Ca
C. N
D. K
In wheat total crop N uptake per ton of grain is about _____?
A. 50-60 Kg
B. 20-30 Kg
C. 15-20 Kg
D. 70-80 Kg
The sever salinity problem has taken lands out of production as _____?
A. 50%
B. 10%
C. 45%
D. 30%
