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.Management Sciences
Category: Soil Science
Point of zero change means____________________?
0
A. All the covalent bonds
B. Zero charge at surface
C. All are ionic bond
D. None of the above
Which compound is mostly used in Pakistan for the reclamation of saline-sodic & sodic soils_________________?
A. Apatite
B. Calcite
C. Dolomite
D. Gypsum
Elements essentially required for growth of all plants species are___________________?
A. 32
B. 15
C. 16
D. 3
Large pieces of erupted magma are called_____________________?
A. Volcanic ash
B. Volcanic block
C. Dike
D. Sill
C12H12N-NaO8S2 is the chemical formula of ____________________?
A. Activated charcoal
B. Azomethine H
C. Carbonated sodium sulphate
D. None of the above
Most abundant mineral in the earth crust is______________________?
A. N-Feldspar
B. Feldspar
C. S-Feldspar
D. Amplubole
The chemical formula of Dolomite is________________?
A. CaMg (CO3)2
B. MgCO3
C. CaCO3
D. None of the above
The nutrient particularly influencing root growth is___________________?
A. Zinc
B. Nitrogen
C. Organic
D. Phosphorus
Organic P content in soil, by ignition method is estimated by igniting the soil at ____________________?
A. 250ºC
B. 1000ºC
C. 550ºC
D. 1250ºC
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