Q17 of 69 Page 15

Patches of white powdery material are seen on the bags of wheat stored in a godown. What does it indicate?

The patches of white powdery material seen on the bags of wheat stored in a godown indicate that the wheat stored in godown is infested by insects and micro-organisms.

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15 How would you control the insects and microorganisms in food grains? 16 How do weeds affect the growth of crops? 18 State the factors, which have helped us to raise food production. 19 Which one of the following crops would require a minimum quantity of NPK or urea for its proper growth?
Cabbage, sugarcane, wheat, soyabean.