SOIL SCIENCE

INSTRUCTIONS TO CANDIDATES

Question ONE is compulsory.

Answer any other THREE

1. a) Define the following terms as applied in Soil Science;
2. Bulk Density (3 Marks)
3. Tilth (3 Marks)

• Texture (3 Marks)

1. Consistency (3 Marks)
2. Cutans (3 Marks)
3. Describe the forces that influence soil water availability to plants. (6 Marks)
4. Briefly explain the classification of African soils.                         (4 Marks)
5. Describe the characteristics of cation exchange reactions. (15 Marks)
6. Explain the factors that affect soil formation process.                                     (15 Marks)
7. What advice in terms plant nutrient availability would you provide to farmers whose soils are acidic?                                                                                     (15 Marks)
8. a)  Define Soil Survey.                                                                                                  (3 Marks)
9. b) Describe types of Soil Surveys. (12 Marks)