A soil is classified as sodic soil when______________________?
A. EC is 8.5
C. SAR is >13
D. All the above
Soil Science
Identify the fertilizer (s) containing potassium____________________?
Identify the fertilizer (s) containing potassium____________________?
A. SOP
B. MOP
C. Chilean salt peter
D. All the above
pH of Pakistani soils is____________________?
pH of Pakistani soils is____________________?
A. 7.5
B. 12
C. 7
D. 14
When two or more functional groups of single ligand are coordinated to metal cation the complex is termed as___________________?
When two or more functional groups of single ligand are coordinated to metal cation the complex is termed as___________________?
A. Chelate
B. Solution complex
C. Complex ion
D. All the above
Vertical movement of water was studied by_________________?
Vertical movement of water was studied by_________________?
A. Ziebig
B. Darcy
C. Kohler
D. Niel
Gravimetric water is present in______________________?
Gravimetric water is present in______________________?
A. Micro pores
B. Macro pores
C. Meso pores
D. None of the above
Permanent change in soil is due to__________________?
Permanent change in soil is due to__________________?
A. Ionic bonding
B. pH change
C. Covalent bonding
D. Isomorphic substitution
Which element can be fixed by smecitite___________________?
Which element can be fixed by smecitite___________________?
A. Mgº
B. Kº
C. NH2
D. Both b & c
Slipperiness is due to__________________?
Slipperiness is due to__________________?
A. Covalent bond
B. Vander walls forces
C. Wire bond
D. None of the above
Who characterized soil formation as set of “4” process______________________?
Who characterized soil formation as set of “4” process______________________?
A. Jinney
B. Ziking
C. Newton
D. Simonson