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.Management Sciences
Category: Soil Science
Elements essentially required for growth of all plants species are___________________?
0
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
Igneous rock whose crystal is 1 cm called____________________?
A. Plutonic
B. Felsic
C. Pegmatitic
D. Mafic
Extraction of humic substance can be done by______________________?
A. NaOH
B. NH4Cl
C. NH4OH
D. None of the above
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