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281.

Under which system mature trees are scattered over the whole area of the forest and felling should proceed annually over the whole area of the estate?

A.	Selection system	B.	Irregular Shelterwood system
C.	Uniform system	D.	None of these

282.

"Manual of silviculture for Pakistan" authored by:

A.	Simmons and H.M.Rana	B.	Champion, Seth and Kattak
C.	Ahmad Hussain	D.	None of these

283.

Principal advantages of the selection system are:

A.	This method is extremely simple	B.	Natural flora is preserved
C.	More volume per acre	D.	All of the above

284.

The principal disadvantages of the selection system are:

A.	The quality of the timber may be inferior to that grown in even-aged crops.	B.	The whole are being always under regeneration.
C.	The light conditions provided by the irregular crop of mixed ages may result in the young growth having a poor chance to develop, except with shadebearing species.	D.	The fellings are scattered over comparatively large areas.
E.	All of the above

285.

_________ consists of a crop arranged in two different stories, one above the other; each story being approximately even-aged not of seedling as opposed to coppice origin:

A.	Two-storied high forest	B.	Three-storied high forest
C.	Four-storied high forest	D.	Five -storied high forest

286.

Mulberry is introduced by ___________

A.	Upper planting	B.	Under planting
C.	Both (a) & (b)	D.	None of these

287.

What is coppice system?

A.	A systems where the crop originates from coppice and where the rotation of the coppice is short.	B.	A systems where the crop originates from coppice and where the rotation of the coppice is long.
C.	Both (a) & (b)	D.	None of these

288.

________ consists in clear-cutting a fixed area annually which is regenerated by coppice shoots:

A.	Simple coppice system	B.	Complex coppice system
C.	Uniform system	D.	None of these

289.

The irrigated plantations of the ______ are regenerated to a great extent by coppice:

A.	Punjab	B.	Sindh
C.	Boluchistan	D.	KPK

290.

A clear-felling with a forest protection over wood and regeneration from coppice is called:

A.	Simple coppice system	B.	Shelterwood coppice system
C.	Uniform system	D.	None of these