Q3 of 465 Page 58

What is inter-cropping? How are crops selected for inter-cropping?

Intercropping. It is growing of two or more crops simultaneously in the same field but in different row patterns.

Crops are selected for intercropping on the basis of different nutrient requirement and different sowing and reaping (harvesting) times, e.g., soybean and maize.


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What is the major problem faced in fish farming ? How can it be overcome.

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Discuss two ways of incorporating desirable characteristics into crop varieties.

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Aditya added 1-2 drops of iodine to three test tubes A,B and C, containing 2 ml of food samples. A dark blue-black colour appeared in test tubes A and B. The correct order of food samples taken in test tubes

(a) rice, dal, potato (b) rice, potato, dal (c) potato, dal, rice (dal, rice, potato

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The following statements, describe the steps to detect the presence of metanil yellow in dal. One of the four statements given below is incorrect.

(a) take 2 ml of food extract


(b) Grind 3-5 g of dal and prepare solution


(c) add 2-3 drops of concentrated H2SO4


(d) fitter the contents and collect the filter