Ligands that occur in Pakistan soils are__________________?
A. OH1 HCO2
B. SO4-2 OH
C. CO3-2 SO4-2
D. All the above
An ion or molecule in the coordination sphere central ion is called__________________?
An ion or molecule in the coordination sphere central ion is called__________________?
A. Complexion
B. Ligand
C. Chelate
D. Potential
Which one of the following are macro nutrients__________________?
Which one of the following are macro nutrients__________________?
A. N,P,K
B. C,H,O
C. Ca,Mg,S
D. All the above
Soil water can be determined by_____________________?
Soil water can be determined by_____________________?
A. Mass water content
B. Macro pores
C. Both a & b
D. None of the above
Size of clay particle is___________________?
Size of clay particle is___________________?
A. 0.02mm
B. 0.2mm
C. 0.002mm
D. 2mm
Shrinking and swelling is property of__________________?
Shrinking and swelling is property of__________________?
A. Clay
B. Silk
C. Water
D. Smecitie
Kaolinite can be identified by______________________?
Kaolinite can be identified by______________________?
A. Spectrophotometer
B. Boiling
C. X-ray diffraction
D. Breaking
Mollic refers to____________________?
Mollic refers to____________________?
A. B-horizon
B. C-horizon
C. U-horizon
D. Surface horizon
Which is passive factor of weathering ?
Which is passive factor of weathering ?
A. Climate
B. Parent material
C. Organisms
D. Temperature
Product of microorganism that appears to chelate calcium is called_____________________?
Product of microorganism that appears to chelate calcium is called_____________________?
A. Pyruive acid
B. 2-ketoghconic acid
C. Carbon dioxide
D. Phospheric acid