Agricultural Science Past Questions

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1181

The atmosphere gains carbon dioxide through the following ways except

A. burning of fuel such as coal and wood
B. respiration by plants and animals
C. photosynthesis in plants
D. death and decay of plants and animals

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1182

Controlled burning has the advantage of

A. increasing the number of soil organisms
B. inducing re-growth of pasture grasses
C. increasing the amount of nutrients in the soil
D. improving soil structure

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1183

Which of the following fertilizers should be applied for good plant growth after prolonged use of sulphate of ammonia on a neutral soil?

A. ammonium nitrate
B. lime
C. urea
D. single superphosphate

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1184

Which of the following statements indicate advantages of sub-surface irrigation? I. Low operation cost once established II. Does not disturb the movement of implements III. Permits efficient use of water IV. easily floods the field

A. I,II and III only
B. II,III and IV only
C. I,II and IV only
D. I,II,III and IV

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1185

The removal of excess water from the sub-soil is known as

A. irrigation
B. drainage
C. evaporations
D. dehydration

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