A. Capillary
B. Hydroscopic
C. Available
D. Gravitational
Soil Science
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
D. None of the above
The deficient level of N (%) in plants suggested by various workers is………………..?
A. 0%
B. 3%
C. 5%
D. 10%
The chemical formula of Hematite is…………………?
A. AL (OH)2
B. Fe2O3
C. Fe OOH
D. None of the above
The little clay mineral is…………………?
A. Non-expending
B. Expending
C. None or little expending
D. None of the above
The net reaction of photosynthesis is…………………?
A. CO2 + H2O light O2 + (CH3O)
B. CaCO3 + 2HCl CaCl2 H2O+CO3
C. ((CH2O) + O2 CO2 + H2O)
D. None of the above