Soil structure without aggregation is known as____________________?
A. Platy
B. Granular
C. Massive
D. Both b & c
Soil Science
The device used for the measurement of positive pressure potential of soil water is known as_________________?
The device used for the measurement of positive pressure potential of soil water is known as_________________?
A. Lysimeter
B. Tensiometer
C. Piezometer
D. Barometer
The safe limit of No2 in drinking water is_____________________?
The safe limit of No2 in drinking water is_____________________?
A. 10 mg L-1
B. 15 mg L-1
C. 20 mg L-1
D. None of the above
The particlesw density of a mineral soil is about____________________?
The particlesw density of a mineral soil is about____________________?
A. 2750 Kg m-3
B. 2550 Kg m-3
C. 2650 Kg m-3
D. None of the above
Deep percolation from a soil profile is generally measured by a device known as_____________________?
Deep percolation from a soil profile is generally measured by a device known as_____________________?
A. Hydrometer
B. Lysimeter
C. Thermometer
D. Tensiometer
Auxins promote___________________?
Auxins promote___________________?
A. Cell elongation
B. Cell division
C. Both a & b
D. None of the above
The chemical formula of Dolomite is________________?
The chemical formula of Dolomite is________________?
A. CaMg (CO3)2
B. MgCO3
C. CaCO3
D. None of the above
The toxicity level of Zn (mg/kg) in plants suggested by some workers is___________________?
The toxicity level of Zn (mg/kg) in plants suggested by some workers is___________________?
A. > 50 mg kg-1
B. > 10 mg-1
C. > 400 mg kg-1
D. None of these
The exact formula for calculating the base saturation percentage is_____________________?
The exact formula for calculating the base saturation percentage is_____________________?
A. Bas saturation percentage = CA+Mg+Na / CEC x 100
B. Bas saturation percentage = /CEC / CA+Mg+Na x 100
C. Bas saturation percentage = /CEC / CA+Mg x 100
D. None of the above
The EC: SAR and RSC values suggested by WAPDA for 3rd class irrigation water(C,S,R,) are____________________?
The EC: SAR and RSC values suggested by WAPDA for 3rd class irrigation water(C,S,R,) are____________________?
A. ECi:<1.5, SAR < 10 & RSC< 2.5
B. ECi:>1.5, SAR > 10 & RSC> 2.5
C. ECi:>1.5, SAR 2.5
D. Both a & b