Question

3. If soil has all the nutrients, why do we need to replenish it?
4. Why is it important to sow seed at the correct depth and distance?
5. Why is the drip system of irrigation is excellent for areas like Rajasthan?
6. What are silos?
7. What do you mean by nitrogen fixation?
8. What is levelling?
9. Name some traditional methods of irrigation.
10.Name few examples of weedicides?

Answer 1

Answer:

1. Even if soil has every nutrients it can lose some part of its nutrients during harvesting and cultivation. we need to replenishe it to grow the same type of plants.
2. it is important to sow seeds at correct depth because if they were planted on the surface they might get eaten by birds. but if they are slowed down deep the plant's shoot will struggle to come towards the surface.
3. drip irrigation slowly waters the plant from a source as a drip for example if a drop of water drips every 30 seconds the amount of water consumed in a minute will be only 30×2×60=60×60=120 drops of water in a hour.
4. silos are destination where the excessive grains are stored, to sell during off seasons.
5. nitrogen fixation is a methord of nitrogen being revolved around the atmosphere, plants and animals.
6. before planting it is important to bring the soil to a exactly accurate level before farming this reduced the struggle of the plant to reach the surface.
7. rope and bucket is the most traditional means of irrigation.
8. chenopodium is a type of a weed, I guess that will destroy the crops and the field.

Thanks, hope it helps you.