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Krm 301: Soil Fertility And Plant Nutrition Question Paper

Krm 301: Soil Fertility And Plant Nutrition

Course:Bachelor Of Education (Science)

Institution: Kenyatta University question papers

Exam Year:2010

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KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2010/2011
INSTITUTIONAL BASED PROGRAMME (IBP) DECEMBER SESSION
EXAMINATION FOR THE BACHELOR OF SCIENCE IN EDUCATION (B.ED
SCIENCE)

KRM 300: SOIL FERTILITY AND PLANT NUTRITION

DATE: Wednesday, 27th April 2011
TIME: 2.00 p.m. – 4.00 p.m.

INSTRUCTIONS:
Answer Question ONE and Any Other THREE Questions

1. (a)
Write short notes on the following;

i.
Cation exchange capacity
ii.
Plant deficiency symptoms
iii.
Macro nutrients
iv.
Luxury consumption level

(b)
Briefly describe three indicators of soil fertility status on smallholder farms of
Africa.

(6 marks)

(c)
(i)
State three types of phosphate fertilizers.

(3 marks)

(ii)
Explain how each of the above should be applied to maximize crop

production.

(6 marks)

Page 1 of 2

2. (a)
Explain four causes of acid soil infertility.

(8 marks)

(b)
Discuss three ways of overcoming acid soil infertility.

(6 marks)

3. Explain five reasons for using an integration of organic inputs and mineral fertilizers in
managing soil fertility.

(15 marks)

4. (a)
Explain three mechanisms through which plants acquire nutrients for growth.

(6 marks)

(b)
State three main problems associated with management of soil phosphorus.

(3 marks)

(c)
Discuss factors influencing fixation of phosphorus in the soil.
(6 marks)

5. (a)
Discuss edaphic factors influencing biological nitrogen fixation on smallholder

farms in sub-Saharan Africa.

(10 marks)

(b)
Explain five (5) practices for enhancing nitrogen fixation in smallholder farms.

(5 marks)

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Krm 301: Soil Fertility And Plant Nutrition Question Paper

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