Soil Science MCQs

The factor used for conversion of P to P2O3 is ________?

A. o.453
B. 0.643
C. 0.436
D. None of the above

Acid soil contain pH _______?

A. <7
B. >7
C. >7.0
D. 8.5

DAP fertilizer available in Pakistan contains _________?

A. 18% N & 46% P2O5
B. 46%N & 18%P2O3
C. 100%P2O3
D. 50%P2O3

Buffer solution is a solution which resist change in ________ ?

A. pH
B. SAP
C. EC
D. RSC

The term applied to a material which tends to absorb moisture from the atmosphere is called ______?

A. Capillary
B. Hydroscopic
C. Available
D. Gravitational

The kaolininte is a layer silicate clay mineral, it is 1:1 type of mineral with _____?

A. 3-15 meq/100g CEC
B. 40 meq/100g CEC
C. 50 meq/100g CEC
D. None of the above

A compound toxic to crop formed by the thermal decomposition of urea is _____?

A. Uric acid
B. Biurct (NH2CONH CONH2 H2O)
C. Diuret
D. Both b & c

The unit of electrical conductivity is _______?

A. dsm-1
B. mmhos/m
C. ms/cm
D. Al the above

The reaction of Na2 CO3 salt is ________?

A. Alkaline
B. Neutral
C. Acidic
D. None of the above

Most of the productive soils in Pakistan have pH ________?

A. Between 7.5 to 8.5
B. 8.5
C. None of the above