Question

Higher Order Thinking Skills,
1. Why the depth at which seeds are planted is important?
2. Why sowing seeds with seed drill is better than broadcasting?
3. How can nitrogen be replenished in soil naturally?
4. Why is it advisable to wash fruits and vegetables before using them?
5. What is biological control of pest? How is it beneficial?
Less costly​

Answer 1

1).Seeds should be sown at proper depth so that they can get air, water and later on sunlight for development. Also their roots may develop at proper depth to hold plant. ... Hence this can lead to decrease in crop yield so some of the plants should be planted deep.

2).The use of seed drill is better because by using seed drill, seeds are down at proper places and proper depth. The seeds are sown perfectly. But by broadcasting there is no proper distance between seeds and they are not at proper depth also. So farmers consider seed drill better than broadcasting.

3 ).Nitrogen Can be Replenished in the Soil by Growing Leguminous Crops. ... The remaining nitrogen compounds made by Rhizobium bacteria mix with the soil in the field and enrich it. Thus, the soil in the fields gets enriched with nitrogen compounds in the natural way.

4).Washing will help remove bacteria, including E. coli, from the surface of fruit and vegetables. ... It is always advisable to wash all fruit and vegetables before you eat them to ensure they are clean and to help remove bacteria from the outside. Peeling or cooking fruit and vegetables can also remove bacteria.

5).Biological control is the beneficial action of parasites, pathogens, and predators in managing pests and their damage. Biocontrol provided by these living organisms, collectively called “natural enemies,” is especially important for reducing the numbers of pest insects and mites.

Answer 2

$\underline\mathfrak{ANSWER:-}$

1.Seeds should be sown at proper depth so that they can get air, water and later on sunlight for development. Also their roots may develop at proper depth to hold plant. ... Hence this can lead to decrease in crop yield so some of the plants should be planted deep.

2.Sowing of seeds by seed drill is better than broadcasting method because : The seed drill sows the seeds uniformly at apporiate distance and depths.

3.Nitrogen Can be Replenished in the Soil by Growing Leguminous Crops. ... The remaining nitrogen compounds made by Rhizobium bacteria mix with the soil in the field and enrich it. Thus, the soil in the fields gets enriched with nitrogen compounds in the natural way.

4. Washing will help remove bacteria, including E. coli, from the surface of fruit and vegetables. ... It is always advisable to wash all fruit and vegetables before you eat them to ensure they are clean and to help remove bacteria from the outside. Peeling or cooking fruit and vegetables can also remove bacteria.

5.Biological control is the beneficial action of parasites, pathogens, and predators in managing pests and their damage. Biocontrol provided by these living organisms, collectively called “natural enemies,” is especially important for reducing the numbers of pest insects and mites.