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Agriculture Form Three Question Paper
Agriculture Form Three
Course:Agriculture
Institution: Form 3 question papers
Exam Year:2009
FRIENDS SCHOOL KAMUSINGA
KIMILILI
FORM 3
APRIL HOLIDAY ASSIGNMENT
AGRICULTURE TERM 1 2009
SECTION A (40 MARKS)
Attempt all questions in this section
1. (a) Name two methods of frame formation in young tea. (1 mark)
2. What is tipping (1 mark)
3. State two disadvantages of the non-capped multiple stem system of pruning coffee. (1 mark)
4. Differentiate between capping and de-suckering in coffee. (1 mark)
5. State two properties of a good vaccine. (1 mark)
6. Why are hooves of animals trimmed. (1 mark)
7. Differentiate between tupping and serving. (1 mark)
8. Why are birds debeaked. (1 mark)
9. On what basis are livestock production animals culled. (1 mark)
10. Outline the procedure followed in disbudding by use of caustic potash stick. (2 marks)
11. Name three methods of castrating animals. (1½ marks)
12. Suggest three factors a bee farm will consider while siting all farm structures.(1½ marks)
13. Outline the many effects of fragmentation of land. (2 marks)
14. Explain the uses of mulch in soil and water conservation. (2 marks)
15. Mention two major groups in which weeds are classified into in a basis of growth cycles, give appropriate examples of each category. (2 marks)
16. How does the plant morphology and anatomy affect selectivity and effectiveness of herbicides. (2 marks)
17. State the factors affecting the efficiency of pesticides. (2 marks)
18. Name two crop diseases caused by each of the following. (2 marks)
i. Fungus
ii. Virus
19. Outline the advantages of zero grazing (stall feeding). (2 marks)
20. State predisposing factors of mastitis. (2 marks)
21. How do high temperatures affect crop production? (2 marks)
22. How may a farmer modify the soil pH on his farm. (2 marks)
23. Name tools used when working on metals. (2 marks)
24. State the reasons why the following tertiary operations is done inproduction of various crops. (2 marks)
Ridging
25. Mention agricultural practices that pollute water. (2 marks)
SECTION B (40 MARKS)
Attempt all the questions in this section
26. (a) Why is organic matter important in the soil. (4 marks)
(b) Use of manures, is limited to small scale due to various problems. List these problems. (4 marks)
27. (a) (i) Name the liverfluke of sheep. (1 mark)
(ii) Name the liverfluke of cattle. (1 mark)
(b) Why would a farmer suspect that her animals are attached by liverfluke. (3 marks)
(c) What options are available to the farmer mentioned in 27(b) above. (3 marks)
28. (a)Given that tomato variety money maker is planted at a spacing of 100 x 50 cm. Calculate the plant population in a plot a land measuring 4 x 3 m (show formulae used). (3 marks)
(b) Afloor of a house dimensions are 10m x 5 m is to be constructed with a concrete slab. The thickness of the slab is 30cm. Cement, sand and ballast is to be used in the ratio 1:2:3 respectively.
Calculate the volumes of cement, sand and ballast used. (5 marks)
29. (a) How is nitrogen fixed by lighting. (2 marks)
(b)(i) Name free-living Nitrogen fixing bacteria. (1 mark)
(ii) Name a denitrifying bacteria. (1 mark)
(c) What factors affect the rooting of cuttings. (4 marks)
30. (a) Differentiate between a rootstock and a scion. (1 mark)
(b) what consideration are used when designing a crop rotation programme. (4 marks)
(c) What are the disadvantages of mulching crops. (3 marks)
SECTION C: (40 MARKS)
Attempt two questions from this section.
31. Describe the field production of maize for grains, starting from seedbed preparation to harvesting. (20 marks)
32. (a) Describe the uses of farm fences. (10 marks)
(b) Describe the digestion of grass in the mouth and rumen of an adult cow. (10 marks)
33. Use the data from the table below to answer the questions that follows, showing effect of labour input on maize yield in Kg/ha
Units of labour inputs Maize yield (Kg)
0 0
1 640
2 1800
3 3000
4 3600
5 3700
6 3600
(i) Calculate the marginal product of maize between 4 and 5 units of labour input. (1 mark)
(ii) Calculate the marginal product of maize between 5 and 6 units of labour inputs. (1 mark)
(b) Explain the difference between the marginal products calculated in (a) (i) and (a) (i) above. (2 marks)
(c) Assume the cost of labour to be 300/= per unit and price of maize to be 3/= per kg.
(i) Calculate the value of the maize produced against the corresponding units of labour inputs. (3 marks)
Units of labour inputs Value of maize (Ksh)
0
1
2
3
4
5
6
(ii) Calculate the cost of labour for producing various quantities of maize given in the table(3 marks)
Units of labour inputs Cost of labour (Ksh)
0
1
3
4
5
6
(d) From the figures you have calculated in (c)(i) and c(ii) above, draw the graph using the same scale and axis. (8 marks)
(e) Explain how the most profitable quantity of maize to be produced can be determined from the graph. (2 marks)
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