Q.1. Clay mineral illite has C.E.C. [cmol. (p+)kg-1] values ranging between.
(1) 3-15
(2) 20-40
(3) 50-80
(4) 80-120
(5) 41-60
Ans: (2) 20-40
Q.2. Among various classes of salt affected soils, the most permeable one is.
(1) Saline
(2) Saline Sodic
(3) Non-Saline Sodic
(4) Degraded Sodic
(5) Degraded Saline Sodic
Ans: (1) Saline
Q.3. The chemical formula of the liming compound "Dolomite" is
(1) CaCO3
(2) MgCO3
(3) CaMg(CO3)2
(4) CaO
(5) CaOCl2
Ans: (3) CaMg(CO3)2
Q.4. Which nitrifying bacteria oxidises Nitrite (NO2) to Nitrate (NO3) is soils
(1) Nitrosomonas
(2) Nitrobacter
(3) Nitrospira
(4) Nitroglea
(5) Azotobactor
Ans: (2) Nitrobacter
Q.5. Boron functions in plants in
(1) N-fixation
(2) NO3 reduction
(3) Fatty-acid synthesis
(4) Sugar translocation
(5) Protein Modification
Ans: (4) Sugar translocation
Q.6. Which phosphate compound is present in Single Super phosphate?
(1) CaHPO4
(2) Ca3(PO4)2
(3) Ca(H2PO4)2
(4) H3PO4
(5) Ca2(HPO4)2
Ans: (3) Ca(H2PO4)2
Q.7. Biurate content in urea is permissible only to an extent of
(1) 1.5%
(2) 2.0%
(3) 3.0%
(4) 4.0%
(5) 4.5%
Ans: (1) 1.5%
Q.8. Potassium (K+) is present in crop plants as
(1) Cell wall
(2) Cell Sap
(3) Mitochondria
(4) Nucleus
(5) Ribosomes
Ans: (2) Cell Sap
Q.9. Tensiometeres measure soil moisture tension (bar) only up to
(1) 30.0
(2)15.0
(3) 0.85
(4) 0.33
(5) 20.0
Ans: (3) 0.85
Q.10. Total degraded land area (mha) in India is
(1) 110.8
(2) 127.3
(3) 152.4
(4) 187.8
(5) 212.5
Ans: (4) 187.8
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