1a) Explain the effects of saline soils to plants (6mks)
b) Discuss best management practices of saline soils (9mks)

2. Discuss the main drivers of soil formation (15mks)

3. a) Explain the functions of the following elements in plant nutrition
i) Nitrogen
ii) Potassium
iii) Molybdenum
iv) Calcium
v) Zinc (10mks)

b) Briefly describe the five land capability classes (5mks)

4 a) Discuss the usefulness of soil organic matter (10mks)
b) Differentiate between autotrophic and heterotrophic organism (5mks)

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