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41.

Tamarix aphylla period of ripening of seed is:

A.	January - March	B.	March - April
C.	November - December	D.	December - January

42.

Terminalia arjuna period of ripening of seeds is:

A.	January - March	B.	February - May
C.	November - December	D.	None of these

43.

Zizyphus mauritiana period of ripening of seeds is:

A.	January - March	B.	March - April
C.	November - December	D.	None of these

44.

Extraction and cleaning is:

A.	Screening	B.	Fanning
C.	Floating	D.	All of the above

45.

Storage of seed is:

A.	Sometimes the seed has to be stored till sowing time	B.	Also many species produce good seed crops only at interval of several years
C.	The seed collected in good years must be stored for several years to provide for the lean years	D.	All of the above

46.

In cold storage the best temperature of storing seed of most species lies between ______

A.	3	B.	2
C.	4	D.	None of these

47.

The best seed moisture content is below 10% of the oven dry weight for the coniferous but it must be kept above _____ for most of the broad leaved species:

A.	20%	B.	25%
C.	30%	D.	35%

48.

Germination tests is:

A.	Nurseries fail quite often as the seed collected is rather old rotten or does not have an embryo	B.	There are several methods to test seed germination percent but the most practical is to, to take a few samples from thoroughly mixed heap
C.	Both (a) & (b)	D.	None of these

49.

Sometimes sound and uninjured seeds may fail to germinate due to reduced activity of the seed or seed parts resulting in blockade of the growth. This may be due to:

A.	External effects of environment	B.	Internal conditions within the plant itself, i.e. Embryo dormancy or seed coat dormancy
C.	Both (a) & (b)	D.	None of these

50.

There are several methods to stimulate seed germination is:

A.	Mechanical scarification	B.	Cold and hot stratification
C.	Acid scarification	D.	Socking seeds in water
E.	All of the above