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531.

Which of the following are the slow release fertilizers?

A.	Surface coated urea	B.	Neem cake and super grain urea
C.	N-serve	D.	All of the above

532.

Which of the following element is mobile in soil?

A.	Ca	B.	Mg
C.	K	D.	N

533.

Which of the following elements regulate oxidation-reduction reaction in plant?

A.	Hydrogen, oxygen and carbon	B.	Nitrogen phosphorus and sulphur
C.	Potassium, calcium, sodium and magnesium	D.	Iron, manganese, molybdenum, copper, boron and zinc

534.

Which of the following fertilizer has maximum plant nutrient?

A.	D.A.P.	B.	T.S.P.
C.	Murate of Potash	D.	Ammonium Nitrate

535.

Which of the following to a high salt tolerant crop?

A.	Lucerne	B.	Moons
C.	Rud	D.	Arhar

536.

Which of the following is an igneous rock?

A.	Quartz	B.	Marble
C.	Mica schist	D.	Slate

537.

Which of the following is a nitrification inhibitor?

A.	A.M. (2, amino-4 6-methyl pyridine)	B.	Thio-urea
C.	Sulfur coated urea	D.	CBC (?-chloroethyl, trimethyl ammonium chloride)

538.

Which of the following is considered as bio-fertilizer?

A.	Farm yard manure	B.	Compost
C.	Green manurg	D.	Blue-green algae

539.

Which of the following is correct explanation of ESP?

A.	Exchangeable Na/CEC	B.	Exchangeable Na x 100//CEC
C.	Exchangeable Na x 100	D.	CEC x 100/Exchangeable Na

540.

Which of the following is harmful to the higher plants?

A.	Phenol carboxylic acid	B.	Vanillic acid
C.	Dihydroxystearic acid	D.	All of these