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51.

Ammonium sulphate contains:

A.	20% sulphur	B.	26% sulphur
C.	16% sulphur	D.	24% sulphur

52.

Ammonium sulphate is preferred for nitrogen application in groundnut because it also provides:

A.	Calcium	B.	Magnesium
C.	Sulphur	D.	Copper

53.

Among the fruits, lemon, apple, plum have been placed in the _____ salt tolerance group.

A.	High	B.	Low
C.	Medium	D.	None of these

54.

Amount of heat required to raise temperature of 1 gm soil from 14 to 15 ?C is known as:

A.	Heat capacity	B.	Specific heat
C.	Thermal conductivity	D.	None of the above

55.

Amount of K in felspar and mica is about:

A.	60%	B.	20%
C.	90%	D.	10%

56.

Amount of K in plants is:

A.	8.0 to 15.0%	B.	10.0 to 8.9%
C.	0.1 to 0.5%	D.	0.3 to 6.0%

57.

Amount of K in soil plough layer is about:

A.	1,000-10,000 kg/ha	B.	10,000-70,000 kg/ha
C.	5,000-6,000 kg/ha	D.	8,000-10,000 kg/ha

58.

An abrupt change in textural class or no continuity found between B and C horizon is termed as:

A.	Textural change	B.	Lithological discontinuity
C.	Regolith	D.	None of them

59.

An argillic sub-surface horizon with high E.S.P. (more than 15) is called:

A.	Cambic horizon	B.	Natric horizon
C.	Agric horizon	D.	Oxic horizon

60.

An epipedon, which has dark colour low in base saturation, is called:

A.	Umbric epipedon	B.	Histic epipedon
C.	Ochrie epipedon	D.	Anthropic epipedon