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Soil And Water Conservation Question Paper

Soil And Water Conservation

Course:Bachelor Of Education Science

Institution: Kenyatta University question papers

Exam Year:2010

KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2009/2010
INSTITUTIONAL BASED PROGRAMME (IBP)
EXAMINATION FOR THE DEGREE OF BACHELOR OF EDUCATION
(SCIENCE)

KRM 406:
SOIL AND WATER CONSERVATION

DATE: Thursday, 29th April, 2010

TIME: 2.00 p.m. – 4.00 p.m.
------------------------------------------------------------------------------------------------------------
INSTRUCTIONS:
Answer question ONE and any other THREE questions.
1. a) Differentiate
between
i)
Evaporation and Transpiration
ii)
Erosivity and Erodibility
iii)
Depression storage and Surface detention
(6 marks)

b)
i)
What is rain water harvesting?

(2 marks)

ii)
State two (2) methods of harvesting rain water in drylands for crop
production
(2
marks)
c)
State and explain four (4) factors which affect infiltration rates
(8 marks)
d)
State three (3) conditions necessary for wind erosion to occur
(3 marks)
e)
Describe how rainfall and evaporation are measured in the field
(4 marks)

Page 1 of 2
2.
a)
Outline five (5) causes of accelerated soil erosion in Kenya

(5 marks)

b)
Discuss the effects of soil erosion on soil productivity
(10 marks)

3.
a)
Name the three (3) types of soil movements in wind erosion. Which one
is the most dominant and why?

(5 marks)

b)
Discuss the factors that influence wind erosion

(10 marks)

4.
State and explain any three (3) agronomic/cultural and two (2) physical measures
used
to
control
erosion. (15
marks)

5.
a)
Describe
the
runoff
process
(4½
marks)

b)
Explain how any five (5) factors affect runoff generation (7½ marks)
c)
Describe three (3) processes by which vegetation cover reduce runoff
(3 marks)

Page 2 of 2

Soil And Water Conservation Question Paper

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