Term 3 Form 3 Agriculture Exam Paper 1

Term 3 Form 3 Agriculture Exam Paper 1

SECTION A:     (30 MARKS)

Answer all questions in this section in the spaces provided

1. Name four processes of biological weathering. (2 mks)

 

2. List two sources of organic matter in the soil. (1 mk)

 

3. Give four advantages of keeping beef cattle in ranches as opposed to nomadic pastoralism.(2 mks)

 

4. List four types of records that may be kept in tomato production (2 mks)
5. State any four effects of rainfall on agriculture. (2 mks)
6. (a) Give three reasons why it is difficult to control Sodom apple weed in a crop field.    (1½ mks)

 

(b)  State three advantages of mechanical weed control through tillage.                         (1½ mks)

 

7. Give four reasons for practicing minimum tillage in seedbed preparation.                          (2 mks)

 

 

8. Give a reason why rolling is carried out in crop production.                                                  (1 mk)
9. State four advantages of rotational grazing as a grazing system.                                          (2 mks)

 

10. Name three crop; diseases caused by viruses.                                                                     (1½ mks)

 

11. State three advantages of land fragmentation.                                                                  (1½ mks)

 

12. State three effects of raindrops on bare soil.                                                                      (1½ mks)

 

13. Outline four factors that affect herbicidal selectivity.                                                           (2 mks)

 

14. Give three reasons why bananas should be pruned.                                                           (1½ mks)

 

15. List four materials used for construction of a gabion.                                                           (2 mks)

 

 

16. Explain the term perishability as applied to vegetable crops.                                               (1 mk)

 

17. State four objectives of settlement schemes in Kenya.                                                         (2 mks)

 

SECTION B:     (20 MARKS)

 

18. The diagram below shows a soil sampling method.

Identify the method of soil sampling.                                                                        (1 mk)

 

(b)        State four activities that are carried out during soil sampling in the field.               (4 mks)

 

 

(c)        Give three precautions taken when collecting a soil sample for soil testing.            (3 mks)

 

19. The diagram below shows a method of forage preservation.

(a)        Identify the structure illustrated above.                                                                    (1 mk)

 

(b)        State the form in which forage is presented as illustrated above.                            (1 mk)

 

(c)        Give the role of each of the following in the structure above                                   (2 mks)

(i)         Polythene sheet

 

(ii)        Drainage.

 

(d)        Name one other method of forage preservation.                                                      (1 mk)

 

20. The illustration below represents a form of physical measures in conservation of soil and water.

Study it and answer the questions that follow.

Identify the illustration above.                                                                                               (1 mk)

 

 

 

Describe how the above physical measure conserves soil and water.                                  (2 mks)

 

 

 

 

 

 

 

 

21. A livestock farmer in Kikuyu can rear dairy cattle, beef cattle or sheep. If the farmer undertakes

each of the enterprises at a time he is likely to get returns as follows:-

 

Dairy cattle                             Kshs.70,000

Beef cattle                               Kshs.65,000

Sheep; farming                       Kshs.75,000

 

From the information given, which enterprise should the farmer choose?

 

 

 

 

Give a reason for your answer in (a) above                                                                (1 mk)

 

 

 

 

What is the opportunity cost of undertaking the enterprise chosen in (a) above?   (1 mk)

 

 

 

 

 

What is the importance of scarcity in agricultural production.                                 (1 mk)

 

 

 

 

 

 

 

 

 

SECTION C:                 40 MARKS:

 

Answer any two questions.

22. (a) Explain five human factors influencing agriculture.                          (10 mks)

 

(b)        Describe the methods used to prepare planting materials before they are planted.  (4 mks)

 

Describe the use of any three materials used in grafting.                                         (6 mks)

 

23. (a) Describe the importance of vegetable crops.                                                            (6 mks)

 

(b)        Explain the cultural methods of pest control.                                                            (7 mks)

 

(c)        Describe the physical methods of erosion control.                                                    (7 mks)

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