1221. Association of two microorganisms in which one is benefited while other remains unaffected is known as:________?
A. Competetion
B. Ammensalism
C. Commensalism
D. This statement is wrong

1222. Organic (O) horizon is absent in_________?
A. Mollisols
B. Histosols
C. Arable soils
D. Non-arable soils

1223. Integrated Nutrient Management (INM) is a well-accepted approach for the sustainable management of________?
A. Soil Productivity
B. Increased crop production
C. both a and B
D. None of these

1224. The appropriate method to apply phosphatic fertilizers is__________?
A. Top dressing
B. Broad casting
C. both A and B
D. Basal placement

1225. The soil samples are dried at _______________, for gravimetric soil analysis?
A. 110 0C
B. 120 0C
C. both A and B
D. 105 0C

1226. Walkley and Blacks method of organic matter determination allows recovery of _____% organic carbon content:
A. 74 %
B. 54 %
C. 62.5 %
D. 34%

1227. Process of mixing of soils is known as_________?
A. Gleization
B. Lessivage
C. Laterization
D. The correct option is not present above

1228. Who will decompose organic matter first:
A. Actinomycetes
B. Bacteria
C. Basidiomycetes
D. Fungi imperfecti

1229. Composition of igneous rock is determined by___________?
A. Depth of molten magma
B. Composition of molten magma
C. Both A and B
D. Composition can not be determined.

1230. Which chemical used to prevent evaporation from surface of water in water bodies?
A. Cetyle alcohol
B. Methyle alcohol
C. both A and B
D. None of these


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