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61.

Alternaria blight disease can be effectively controlled by:

A.	BHC	B.	Aldrin
C.	Treating seeds with hot water	D.	All of the above

62.

Ammonium sulphate contain approximately:

A.	10% nitrogen	B.	20% nitrogen
C.	28% nitrogen	D.	36% nitrogen

63.

Which one of the following is evergreen temperate plant?

A.	Apricot	B.	Chilgoza
C.	Plum	D.	Almond

64.

An acidic buffer solution can be prepared by mixing solution of:

A.	Ammonium acetate and acetic acid	B.	Ammonium chloride and ammonium hydroxide
C.	Sulphuric acid and sodium sulphate	D.	Sodium chloride and sodium hydroxide

65.

An agent that causes gene mutations is known as:

A.	Mutant	B.	Mutation
C.	Mutagen	D.	Mutator

66.

An area in which seeding are raised to be transplanted elsewhere is called:

A.	Brashing	B.	Shifting cultivation
C.	Crop rotation	D.	Nursery

67.

An enzyme excreted by a microorganisms into the environment is called:

A.	Exoenzyme	B.	Endoenzyme
C.	Coenzyme	D.	None of the above

68.

An enzyme formed within the cell and not excreted into the medium (intra cellular) is called:

A.	Exoenzyme	B.	Apoenzyme
C.	Endoenzyme	D.	Coenzyme

69.

An example of parallel cropping is:

A.	Sugarcane + Potato	B.	Potato + Mustard
C.	Potato + Radish	D.	Wheat + Mustard

70.

An example of the market classified on business basis:

A.	Terminal	B.	Retail
C.	Raw material	D.	Secondary