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MEDIUMENGLISHAgriculture

Increment determination by control method is / are:

AIn Swiss, forest are managed intensively under selection system

BEach compartment is enumerated 100% at 5-6 years intervals

CRecords are kept by compartments of all mortality and all cut trees in interval between two successive counts

DAll of the above

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MEDIUMENGLISHAgriculture

Estimation of movement ratios from average diameter growth by diameter classes is / are :

ATree diameters include in a dia class in the present stand tables are distributed uniformly, about the class centre

BMovement ration: Proportion of trees which will move onto next higher classes

CBoth (a) & (b)

DNone of these

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MEDIUMENGLISHAgriculture

From yield table we determine:

AFuture increment of even aged crop can be from valid yield table

BUnder stocked stands tend to approach fully stocked stands with increase in age, though more rapid growth than the latter

CBoth (a) & (b)

DNone of these

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MEDIUMENGLISHAgriculture

Current annual increment (CAI) means:

AEvery year, the volume of a growing tree or of a stand of trees, increases by quantity

BBut periodic annual increment after 5/10 years is taken to be CAI

CBoth (a) & (b)

DNone of these

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MEDIUMENGLISHAgriculture

Variation of volume increment with age is:

ACurrent annual increment (CAI)

BMean annual increment (MAI)

CBoth (a) & (b)

DNone of these

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MEDIUMENGLISHAgriculture

What is increment?

AThe increase in girth, diameter, basal area, height, volume, quality

BValue of individual tree or crops during a given period

CUtilizable portions of total woody growth goes on increasing

DAll of the above

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MEDIUMENGLISHAgriculture

Free thinning is:

AThe attention is concentrated still further on the selection of the stems evenly spaced over the ground

BWhich are to be retained to maturity or till the last thinning or two

CBoth (a) & (b)

DNone of these

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MEDIUMENGLISHAgriculture

Mechanical thinning is:

AThe trees to be cut or retained are chosen on the basis of a predetermined spacing

BOr pattern with little or no regard for their position in the crown canopy

CBoth (a) & (b)

DNone of these

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MEDIUMENGLISHAgriculture

The classes of trees are removed in selection thinning:

AThey are restricting the development of their neighbours on all sides

BThey are less valuable than their neighbours

CThey are of no special importance with regard to desirable species mixture

DAll of the above

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MEDIUMENGLISHAgriculture

Selection thinning is:

AIn principle from the two methods already discussed

BThe dominant trees are removed in order to stimulate the growth of the trees of the lower crown classes

CThe same kind of vigorous trees those are favoured in crown

DAll of the above

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MEDIUMENGLISHAgriculture

Crown thinning or high thinning is:

ATrees are removed from the upper crown classes in order to open up the canopy

BIt favour the development of the most promising trees of the same classes

CBoth (a) & (b)

DNone of these

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MEDIUMENGLISHAgriculture

Low thinning or ordinary thinning is:

ATrees are removed from the lower crown classes

BIn the highest grade of low thinnings only the suppressed trees would be removed

CBoth (a) & (b)

DNone of these

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MEDIUMENGLISHAgriculture

Diseased trees (k) including those which are infected with parasites to such an extent that their growth is seriously affected or that they are a danger to their neighbours:

ADominant

BDominated and suppressed

CBoth (a) & (b)

DNone of these

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MEDIUMENGLISHAgriculture

Dead and Moribund trees (m) include:

ABent over

BBadly leaning trees usually of the whip type

CBoth (a) & (b)

DNone of these

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MEDIUMENGLISHAgriculture

Suppressed trees (S) is:

AWhich reach only about half to 5/8th of the height of the best trees with their leading shoots definitely overtopped by their neighbours

BAl least shaded on all sides by the cm

CA small tree of height typical of suppressed trees standing with its leader free in a chance gap should not be classed as D or D

DAll of the above

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MEDIUMENGLISHAgriculture

Dominated trees (d) is:

AWhich do not form part of the upper most leaf canopy

BBut the leading shoots of which are not definitely overtopped by the neighbouring trees

CBoth (a) & (b)

DNone of these

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MEDIUMENGLISHAgriculture

Dominant tree: Including all trees which form the upper most leaf canopy and have their leading shoots free. These are usually sub-divided into:

APredominant trees comprising all the largest trees which determine the general top level of the canopy

BCodominant trees which fall short of this, averaging about 5/6th of the height of predominant

CTrees with forked leader and similar defects

DAll of the above

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MEDIUMENGLISHAgriculture

The fundamental objectives of thinning are:

ATo redistribute the growth potential of the stand to optimum advantage

BTo utilize all the merchantable material produced by the stand during the rotation

CBoth (a) & (b)

DNone of these

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MEDIUMENGLISHAgriculture

Thinnings is:

AA felling made in an immature stand fox the purpose of improving the growth and form of the trees that remain, without permanently breaking the canopy

BCutting made in immature stands in order to stimulate the growth of the trees that remain and to increase the total yield of useful material from the stand are termed thinnings

CBoth (a) & (b)

DNone of these

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MEDIUMENGLISHAgriculture

The injuries are generally caused by:

AUnnecessary haste

BUse of improper tools

CPruning during the growing season when the bark is loose

DAll of the above

Open Detail

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Search MCQs

MEDIUMENGLISHAgriculture

Increment determination by control method is / are:

AIn Swiss, forest are managed intensively under selection system

BEach compartment is enumerated 100% at 5-6 years intervals

CRecords are kept by compartments of all mortality and all cut trees in interval between two successive counts

DAll of the above

Open Detail

MEDIUMENGLISHAgriculture

Estimation of movement ratios from average diameter growth by diameter classes is / are :

ATree diameters include in a dia class in the present stand tables are distributed uniformly, about the class centre

BMovement ration: Proportion of trees which will move onto next higher classes

CBoth (a) & (b)

DNone of these

Open Detail

MEDIUMENGLISHAgriculture

From yield table we determine:

AFuture increment of even aged crop can be from valid yield table

BUnder stocked stands tend to approach fully stocked stands with increase in age, though more rapid growth than the latter

CBoth (a) & (b)

DNone of these

Open Detail

MEDIUMENGLISHAgriculture

Current annual increment (CAI) means:

AEvery year, the volume of a growing tree or of a stand of trees, increases by quantity

BBut periodic annual increment after 5/10 years is taken to be CAI

CBoth (a) & (b)

DNone of these

Open Detail

MEDIUMENGLISHAgriculture

Variation of volume increment with age is:

ACurrent annual increment (CAI)

BMean annual increment (MAI)

CBoth (a) & (b)

DNone of these

Open Detail

MEDIUMENGLISHAgriculture

What is increment?

AThe increase in girth, diameter, basal area, height, volume, quality

BValue of individual tree or crops during a given period

CUtilizable portions of total woody growth goes on increasing

DAll of the above

Open Detail

MEDIUMENGLISHAgriculture

Free thinning is:

AThe attention is concentrated still further on the selection of the stems evenly spaced over the ground

BWhich are to be retained to maturity or till the last thinning or two

CBoth (a) & (b)

DNone of these

Open Detail

MEDIUMENGLISHAgriculture

Mechanical thinning is:

AThe trees to be cut or retained are chosen on the basis of a predetermined spacing

BOr pattern with little or no regard for their position in the crown canopy

CBoth (a) & (b)

DNone of these

Open Detail

MEDIUMENGLISHAgriculture

The classes of trees are removed in selection thinning:

AThey are restricting the development of their neighbours on all sides

BThey are less valuable than their neighbours

CThey are of no special importance with regard to desirable species mixture

DAll of the above

Open Detail

MEDIUMENGLISHAgriculture

Selection thinning is:

AIn principle from the two methods already discussed

BThe dominant trees are removed in order to stimulate the growth of the trees of the lower crown classes

CThe same kind of vigorous trees those are favoured in crown

DAll of the above

Open Detail

MEDIUMENGLISHAgriculture

Crown thinning or high thinning is:

ATrees are removed from the upper crown classes in order to open up the canopy

BIt favour the development of the most promising trees of the same classes

CBoth (a) & (b)

DNone of these

Open Detail

MEDIUMENGLISHAgriculture

Low thinning or ordinary thinning is:

ATrees are removed from the lower crown classes

BIn the highest grade of low thinnings only the suppressed trees would be removed

CBoth (a) & (b)

DNone of these

Open Detail

MEDIUMENGLISHAgriculture

Diseased trees (k) including those which are infected with parasites to such an extent that their growth is seriously affected or that they are a danger to their neighbours:

ADominant

BDominated and suppressed

CBoth (a) & (b)

DNone of these

Open Detail

MEDIUMENGLISHAgriculture

Dead and Moribund trees (m) include:

ABent over

BBadly leaning trees usually of the whip type

CBoth (a) & (b)

DNone of these

Open Detail

MEDIUMENGLISHAgriculture

Suppressed trees (S) is:

AWhich reach only about half to 5/8th of the height of the best trees with their leading shoots definitely overtopped by their neighbours

BAl least shaded on all sides by the cm

CA small tree of height typical of suppressed trees standing with its leader free in a chance gap should not be classed as D or D

DAll of the above

Open Detail

MEDIUMENGLISHAgriculture

Dominated trees (d) is:

AWhich do not form part of the upper most leaf canopy

BBut the leading shoots of which are not definitely overtopped by the neighbouring trees

CBoth (a) & (b)

DNone of these

Open Detail

MEDIUMENGLISHAgriculture

Dominant tree: Including all trees which form the upper most leaf canopy and have their leading shoots free. These are usually sub-divided into:

APredominant trees comprising all the largest trees which determine the general top level of the canopy

BCodominant trees which fall short of this, averaging about 5/6th of the height of predominant

CTrees with forked leader and similar defects

DAll of the above

Open Detail

MEDIUMENGLISHAgriculture

The fundamental objectives of thinning are:

ATo redistribute the growth potential of the stand to optimum advantage

BTo utilize all the merchantable material produced by the stand during the rotation

CBoth (a) & (b)

DNone of these

Open Detail

MEDIUMENGLISHAgriculture

Thinnings is:

AA felling made in an immature stand fox the purpose of improving the growth and form of the trees that remain, without permanently breaking the canopy

BCutting made in immature stands in order to stimulate the growth of the trees that remain and to increase the total yield of useful material from the stand are termed thinnings

CBoth (a) & (b)

DNone of these

Open Detail

MEDIUMENGLISHAgriculture

The injuries are generally caused by:

AUnnecessary haste

BUse of improper tools

CPruning during the growing season when the bark is loose

DAll of the above

Open Detail