Soil Science MCQs

Mean annual precipitation for tundra region is ______?

A. 70-80 cm
B. 150-70 cm
C. 0-50 cm
D. None of the above

Equation of Ozone is ________?

A. O2 + O =O3
B. O3 + O
C. O2 O
D. None of the above

The earth core is made of the following metals ______?

A. Fe & Ni
B. Mg & Ni
C. Cu & Ni
D. None of these

Corrositivity of water is an indication of _______?

A. Salinity
B. Property of polluted material
C. Both a & b
D. None of the above

Cyclic salts are mostly of _____?

A. SO4
B. HCO₃
C. Cl^–
D. None of the above

Total salt affected soils of Pakistan are ________?

A. 6.3 m ha
B. 5.0 m ha
C. 12.3 m ha
D. 10.5 m ha

Salt-tolerant plants are called ____?

A. Glycophytes
B. Halophytes
C. Xerophytes
D. All the above

Gold is _______?

A. Native element
B. Secondary element
C. Primary element
D. Heavy metal

Na and k can be determined by the use of _______?

A. Hydrometer
B. Flame photometer
C. Spectrophotometer
D. All the above

The problem of soil crosion Thal and Cholistan is predominantly due to _______?

A. Wind
B. Air
C. Water
D. All the above