Agriculture Questions and Answers - Grade 7 Mid Term 2 Exams 2023 Set 3

QUESTIONS

1. Name two main causes of soil erosion. (2 marks)
2. Write two types of soil erosion that you know. (2 marks)
3. Write the meaning of the following terms. (2 marks)
   1. Pruning
   2. Weeding.
4. What is the importance of carrying out the following practices on the nursery bed? (2 marks)
   1. Thinning
   2. Shading
5. What is the meaning of the term deterrents? (1 mark)
6. Teacher Pendo asked her learners to name the two types of innovative gardening.
   1. Which two answers would you expect the learners to mention? (2 marks)
   2. Of the two methods of innovative gardening mentioned above, which one occupies less space? (1 mark)
7. Mark was given an exercise where he was required to name three examples of indigenous vegetable crops. He was expected to write (3 marks)
8. A type of soil has the following characteristics.
   1. It has the smallest soil particles
   2. It retains the highest amount of water
      State two crops that can grow on the type of soil described above. (2 marks)
9. What is the importance of sprinkling ash on the compost manure materials? (1 mark)
10. State 3 materials that can cause soil pollution. (3 marks)
11. Discuss two farming practices that may cause soil pollution. (2 marks)
12. Grade 7 learners from Ingusi Junior Secondary School were advised by their teacher of Agriculture not to burn plastic containers. Why do you think they were advised so? (1 mark)
13. Mama Ivana was asked by her children to assist them in naming three ways of controlling soil pollution in the agricultural environment. Give three ways that she was expected to name. (3 marks)
14. Leaners from Jomvu JSS were required to create awareness massages against dumping of soil pollutants. Which three methods would the learners use to create the awareness messages? (3 marks)
15. Write the meaning of water conservation in farming. (2 marks)
16. Name 2 benefits of conserving water in farming. (2 marks)
17. Write one water retention structure used to conserve surface runoff. (1 mark)
18. Bwana Mkulima wanted to construct an earth basin. What does he need to construct the earth basin? (3 marks)
19. What is the importance of water retention pits in farming? (1 mark)
20. Why are minimum tillage practices important in farming? (1 mark)
21. Growing of trees together with crops or pastures on the same piece of land is known as (1 mark)
22. The following learners were asked to name examples of different planting materials. Write what each of them would have written as the correct answer. (3 marks)
    NJERI: small seeds
    KEVO: medium sized seeds
    NURU: large planting materials
23. The physical conditions of the soil after cultivation are referred to as (1 mark)
24. Describe 2 factors to consider when selecting a planting site. (2 marks)
25. Write two benefits of agroforestry. (3 mark)

MARKING SCHEME

1. wind, water
2. guley erosion, sheet erosion, splash erosion, rill erosion
3. pruning-cutting some of the branches of plants
   weeding-it is removing unwanted plants from the farm
4. thinning- ensures that we have only healthy and strong plants on the farm
   shading-keeps the plants from direct sunlight, it reduces evaporation of water
5. deterrents-it is something used on the farm to ensure that small wild animais don't destroy the crops and animals
6. vertical garderin and horizontal gardening
7. pig weed, black nightshade, pumpkin leaves, cowpeas etc
8. crops that can grow on clay soil eg rice
9. It increases the rate of decomposition of the materials
10. artificial fertilisers, agricultural chemicals, waste like plastics etc
11. excessive use of fertilisers, excessive use of agricultural chemicals, poor disposal of waste etc
12. buming the plastic containers causes air pollution, it harms living organisms on the ground, it leaves the soll bare hence soil erosion may take place
13. Using the correct type of fertiliser
    using the correct amount of fertiliser
    safe disposal of agricultural chemical containers
    safe disposal of plastic waste
14. dramatisation, using songs and poems, using posters etc
15. It is using agricultural practices that ensure that water is not wasted
16. the water can be used in times of scarcity, it saves money that would have been used to buy water, it ensures availability of water of humans and livestock
17. water retention ditches, earth basins, water retention pits
18. slasher, panga, jembe, spade/shovel, wheelbarrow etc
19. the water that collects in the water retention pits is used for growing crops
20. Minimum tillage practices help in conserving water on the farm
21. agroforestry
22. small seeds-millet, sorghum etc
    medium sized seeds-maize, beans etc
    large planting materials-suckers, woody cuttings etc
23. soll tilth
24. the size of planting materials, availability of sunlight, protection from animals and human damage, the soll type and fertility
25. It prevents soll erosion, improves water conservation in the soil, t'reduces water runoff etc