1. a) Explain ways through which soil becomes acidic

b) What is the importance of lime to soil?
c) Explain factors considered before applying lime to soil.

2. a) What is meant by biological control of a crop pest?
b) Explain characteristics of a good biological pest control agent.
c) Give the advantages of controlling pests using biological control method.

3. An experiment was carried out on maize seeds to find changes in starch and sugar ontents of the seeds during germination in darkness. The results of the experiment are shown in Table 1.
Study the table and answer questions that follow.

Table 1

a) On the same axis, plot a graph of changes in starch and sugar content against days from start of the experiment.
b) Describe the shape of each curve on your graph
c) Explain the relationship between the two curves.
d) What is the role of water in germination?

4. a) Explain the criteria used to select farm machines.
b) Discuss ways of encouraging mechanization in agricultural production
c) Outline farm operations that can be mechanized.

5. a) Explain factors that should be considered when choosing materials for construction in a farm.
b) Suggest possible causes of weaknesses in farm buildings.
c) What are the characteristic of a good farm store?

6a) Describe management practices carried out on a piglet during the first week of its life.
b) Give reasons for the popularity of pig rearing in Uganda.

7. a) What is digestibility?
b) Explain factors that influence digestibility of feeds.
c) Explain why allowance is given for extra ingredients during feed formulation.

AGRICULTURAL ECONOMICS
8. a) Examine the consequences of a high population on agricultural production.
b) Suggest measures that can be taken to meet the food demands of the growing population in Uganda.

9. a) Outline roles of agricultural research institutions in Uganda.
b) Explain ways in which government can promote agricultural development in Uganda.