Question

1. Which of the following is/are post harvesting technique(s)?
(a) Winnowing (c) Storage of food grains
(b) Threshing (d) All of these
2. NPK fertilizers contains
(a) Nitrogen ,Potassium & Calcium (c) Nitrogen, Phosphorus& Potassium
(b) Nitrogen, Potassium & Phosphorus (d) Nitrogen, Phosphorus &Keratin
3. Manual removal of weeds is done by:
(a) Trowel (c) Insects
(b) Weedicides (d) Tilling
4. Major source of water in fields is:
(a) River (c) Ponds
(b)Tube wells (d) Rainfall
Q5. What is crop rotation?
Q6. Why organic manure is considered better than chemical fertilizer?
Q7. What precautions should be taken care while storing harvested grains?
Q8. List some advantages of preparing soil.
Q9. A farmer was using lot of fertilizers for the improvement of his produce from the
field. List any two harmful effects of fertilizers on environment.
How will you convince him to restrict the use of fertilizers?

Answer 1

Answer:

ans1- d option ( all of these)

ans2- b option ( Nitrogen, Potassium & Phosphorus)

ans3- b option ( Weedicides)

ans4- d option ( rainfall)

ans5- Crop rotation is the practice of growing a series of different types of crops in the same area.

ans6- Organic manure or organic fertilizer is made up of organic biodegradable waste like animal excreta and agriculture wastes. As it biodegradable it cannot harm the environment and increase the soil fertility it is better than chemical fertilizer.

ans7- The grains should be stored in new or clean bags to avoid infections. The crops must be clean, insect free, cool and dry. The mouth of the bags should be stitched properly after filling with grains.

ans8- It helps the roots to retain plants moisture.

It helps the roots to take water and minerals easily.

It helps the soil to mix well with fertilizers.

It helps to bring the nutrient rich soil to the top.

It helps to remove undesirable plants called weeds.

ans9- using a lot of fertilizers decrease the soil fertility and also pollute water bodies when get draind due to wind, water, etc. He should use manure made from cow dungs, dead plants , etc.

Explanation:

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