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281.

Q = KA (P1-P1)/n1 denotes the:

A.	Fick's law of diffusion	B.	Stoke's law of velocity of particle falling
C.	Darcy's equation of gas flow	D.	None of these

282.

Q = Ki is the ______ equation:

A.	Darcy's equation	B.	Fick's law
C.	Both	D.	None of these

283.

Radioactive tracer technique is used for determining:

A.	Translocation of minerals in plants	B.	Cations exchange capacity of soil
C.	Both these	D.	None of these

284.

Which one of the following organic matter has the narrowest C/N ratio?

A.	Mustard	B.	FYM
C.	Compost	D.	Groundnut cake

285.

Refers to the study of the origin of soils in there natural environment, its classification and description:

A.	Edaphology	B.	Pedology
C.	Geology	D.	None of the above

286.

Refers to the study of the soil properties in relation to crop production:

A.	Soil taxonomy	B.	Geology
C.	Pedology	D.	Edaphology

287.

Refers to the upper most biochemical weathered portion of the regolith:

A.	Soil	B.	Earth
C.	Rock	D.	None of the above

288.

Release of nutrients like nitrogen, phosphorus and sulphur from the added organic matter by M.O. at the initial stage of degradation will depend upon:

A.	Soil pH	B.	Soil temperature
C.	Chemical composition of added organic matter	D.	Method of incorporation

289.

Rhizobia infect the host legumes through:

A.	Eqidermal cells	B.	Cortex cells
C.	Root bairs	D.	All of the above

290.

Rhizobium after infection converts to a form, which is irregular in shape and is called:

A.	Spore	B.	Cyst
C.	Bacteriod	D.	None of the above