NCERT Solutions For Class 8 Science Chapter 1 Crop Management LAQs

NCERT Solutions For Chapter 1 Crop Management Long Answer Questions

Question 1. Given below is a conversation between two farmers, Heera and Beera.

1. Heera: Brother Beera, your maize crops look Beautiful. They have grown pretty fast.
2. Beera: Yes, I have sprayed urea this time. What about you?
3. Heera: Well, I am still relying on good old cow dung. I am saving money to buy a tractor.
4. Beera: That’s good. A tractor saves a lot of time and labour.
5. Heera: Yes, it’s been very labour-intensive for me, and now these weeds have come up.
6. Beera: Try weedicides, they are very effective. Now, answer the following questions.
7. List the practices that are not environmentally friendly and why.
8. What is the advantage of modern agricultural implements over traditional ones?
9. Name one weedicide, and the precaution farmers must take during its application?

Answer: 

1. The practices used in the field that are not environmentally friendly are the use of fertilizers, pesticides, herbicides, and other chemical substances that pose health hazards. Tractor, though it saves labour and time, contributes to air pollution
2. Modern agricultural implements save both time and labour as compared to traditional types of equipment.
3. To crops is that they should properly cover their nose and mouth, to avoid inhaling these chemicals.

NCERT Solutions for Crop Management Chapter 1 LAQs

NCERT Class 8 Science Chapter 1 Crop Production LAQs with Answers

Question 2. A farmer wants to grow crops in his field between June and July. The chart below shows a list of crops and different agricultural practices.

Select two crops from the list that grow best during June and July.

Crop 1………Crop 2

The farmer prepared the soil in his field by turning and loosening the soil. How does turning and loosening the soil help in growing plants?

Answer: Crop 1→Paddy Crop 2 → Cotton

1. The turning and loosening of the soil helps the plants in the following ways
2. Farmers follow a sequence of agricultural practices to grow crops. A part of the sequence is shown below.
3. It brings the nutrient-rich soil to the top layer, so that the plant can use these nutrients.

NCERT Solutions for Class 8 Science Chapter 1 LAQs

NCERT-Based Long Questions On Crop Production For Class 8

Choose an appropriate agricultural practice from the chart above to fill in the box.

Irrigation→Protection from weeds→ Winnowing

Answer: Irrigation→ Protection from weeds Harvesting! Winnowing

Question 3. Weedicides are chemicals that are sprayed on crop fields to remove weeds

NCERT Solutions for LAQs Crop Management Class 8

The graph shows the production of the wheat crop from each field over two years.

Question 4. Why did the farmer not spray any weedicide on Field 3?
Answer: The farmer did not spray any weedicides on field 3 because, without field 3, the farmer would not be able to tell if the weedicide was effective or not

1. What can the farmer conclude from his tests?

1. Weedicides 1 and 2 were not effective in controlling weeds.
2. Wheat production was better in fields sprayed with weedicide.
3. Crop production decreased in Field 3 as the soil was not fertile.
4. Weedicide was more effective than Weedicide 2 in controlling weeds.

Answer: Wheat production was better in fields sprayed with weedicide.

Crop Production and Management LAQs NCERT Class 8

Question 10. The farmer friend suggested that the farmer should have tested weedicide 1 on the wheat field and weedicide 2 on the mustard field. Will this suggestion help improve the experiment? Explain your answer.
Answer: No, this will not help to improve the experiment. We cannot compare the production of wheat with the production of mustard. To compare the effect of two different weedicides, the crop should remain the same

1. Why are woodlardos generally sprayed on weeds before they start producing flowers and seeds?

1. Woodlard can kill only young weeds.
2. Woodlard can kill the crops if not sprayed early.
3. Tho weeds cannot be killed after they start producing flowers and seeds.
4. The flowers produce more seeds, and the seeds germinate to form more Weeds

Answer: The flowers produce more seeds, and the seeds germinate to form more weeds.