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331.

Solum is made up of:

A.	C horizon	B.	C+D horizon
C.	A+B+C horizon	D.	None of these

332.

Some pesticides with positively charged groups are also absorbed by:

A.	Illite clays	B.	Kaolinite clays
C.	Montmorillonite clays	D.	Silicate clays

333.

Specific heat of the dry soil is equal to:

A.	1.0 cal/gm	B.	0.5 cal/gm
C.	0.5 cal/gm	D.	None of the above

334.

Specific heat of the mineral matter is:

A.	0.462 Cal gm-1	B.	0.18 Cal gm-1
C.	1.0 Cal gm-1	D.	24.0 Cal gm-1

335.

Standard way of collecting a soil sample is to take:

A.	One sample from centre of the field	B.	One sample each from every corner of the field and mix
C.	Several samples from all over the field and mix	D.	None of these

336.

Steamed bone-meal contains:

A.	18% P2O5	B.	16% P2O5
C.	22% P2O5	D.	25% P2O5

337.

Sulphate of potash is preferable to MoP for tobacco because:

A.	The chlorine in the MoP effect the burning quality of tobacco	B.	The chlorine in the MoP increases the nicotine content of tobacco
C.	The application of MoP results in the luxury consumption of potassium	D.	The sulphate iron helps to increase the availability of other nutrients

338.

Super-digested compost is called so because:

A.	It is prepared by allowing it to decompose beyond the normal process of decomposition	B.	It contains plant nutrients more than present in ordinary compost
C.	Super-phosphate is added to the compost during its preparation	D.	Its P2O5 content is more than that present in the ordinary compost

339.

Symbiotic association of fungal hyphae with plant roots is known as:

A.	Mycorrhiza	B.	Mutual infection
C.	Lichen	D.	Co-parasitism

340.

Tarai soils are generally deficient in:

A.	Zinc	B.	Nitrogen
C.	Phosphorus	D.	Potash