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Efa 512: Soil Management And Productivity Question Paper

Efa 512: Soil Management And Productivity

Course:Master Of Environmental Studies

Institution: Kenyatta University question papers

Exam Year:2012

DATE: WEDNESDAY, 28TH MARCH 2012
TIME: 9.00 A.M -12.00 NOON
INSTRUCTIONS
Answer Question ONE and any other FOUR.
Q.1) (a)
Discuss the following terms in relation to sol productivity.
(10 marks)

(i)
Hydration

(ii)
Isomorphic substitution

(iii)
Nitrogen fixation

(iv)
Ammensalism

(v)
Methylation

(b)
Inorganic fertilizers are the solution to the soil productivity problem in sub

Saharan Africa, discuss.

(12 marks)
Q.2) The nitrification process is a necessary evil, discuss.

(12 marks)
Q.3) A farmer from Magadi has approached you to help him manage his saline and sodic soils,
clearly explain to him what to do.

(12 marks)
Q.4) (a)
Giving examples, discuss the major challenges associated with tropical
soils.

(5 marks)

(b)
Explain practical ways that may be used to overcome the challenges
in (a) above.

(7 marks)
Q.5) (a)
Discuss the factors affecting availability of potassium to plants. (7 marks)

(b)
Explain how the availability of potassium to crops can be enhanced (15 marks)
Q.6) Discuss humus formation process and state its relevance in soil management. (12 marks)
Q.7) Explain how you would help farmers enhance the availability of phosphorus in rock

phosphate fertilizers in their farms.

(12 marks)
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