Question # 1

For rubber plantation, trees and planted apart:

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One meter

5 meters

10 meters

20 meters

The continent of Africa produces world's:

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6 percent rubber

20percent rubber

50percent rubber

10percent rubber

When did natural rubber production started in Sri Lanka (Ceylon)?

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1900 A.D

1850A.D

1880A.D

1857A.D

For rubber plant plantation, which soil is most suitable?

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Marshy land

Sandy soil

Clayey soil

Red soil with excessive phosphorus & humus

Most of natural rubber production in the world is being used:

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For manufacturing water-proof cloth

For manufacturing tyre & tube

For manufacturing toys

For manufacturing utensils

U.S.A consume world's:

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50 percent natural rubber

25percent natural rubber

70percent natural rubber

80percent natural rubber

British explorer Sir Henry Wickham in:

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1876 A.D smuggled rubber seed in U.K

1820 A.D smuggled rubber seeds

1750 A.D smuggled rubber seed in U.K

1900 A.D smuggled rubber seed

In one hectare, how many rubber plants can be planted ?

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250 plants

100plants

500plants

1000plants

Hevea brasiliensis plant provide world's

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50 percent natural rubber

90 percent natural rubber

One-third natural rubber

Small amount of natural rubber

At present, Brazil produce world's only:

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10 percent rubber

20 percent rubber

One percent rubber

30 percent rubber

For best vegetative growth of natural rubber plant:

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There is not any need of rainfall

Small amount of rainfall is enough

70-100 inches rainfall is needed

Only 30 inches rain-fall is enough

For rubber plant plantation, which soil is most suitable ?

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Marshy land

Sandy soil

Clayey soil

Red oil with excessive phosphorus & humus

Per rubber plant, annual rubber production is about:

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20 pounds

4-5 pounds

50 pounds

Very small amount

Hevea brasiliensis's smuggled rubber seeds from Brazil were propagated in London's:

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Kew Gardens

LawrenceGardens

WahGardens

MayoGardens

In one year, for how many days, rubber plant producer rubber ?

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100 days

50 days

200-300 days

throughout the year

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