Soil Science MCQs

pH of Pakistani soils is ______?

A. 7.5
B. 12
C. 7
D. 14

Identify the fertilizer (s) containing potassium ______?

A. SOP
B. MOP
C. Chilean salt peter
D. All the above

A soil is classified as sodic soil when ______?

A. EC is 8.5
C. SAR is >13
D. All the above

The available from of nitrogen for plant is ____?

A. NO₃
B. NH₄
C. Both a & b
D. None of the above

The molar mass of NaCl is _______?

A. 56.58
B. 43.28
C. 50.58
D. 58.58

The available form of calcium to plant is _____?

A. Ca(free cation
B. CaO
C. Ca
D. None of the above

International atomic weight of potassium is _____?

A. 39.0
B. 40.0
C. 41.0
D. 38.0

The chemical formula of urea fertilizer is ________?

A. NH₂CONH₂
B. [CO(NH₂)]
C. Both a & b
D. None of the above

Mineral soil contain organic carbon ___?

A. >4%
B. 5%
C. <20%
D. >10%

Histols are found in _______?

A. Pakistan
B. Canada
C. Alaska
D. Both b & c