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Krm 520: Land Degradation And Productivity Management Question Paper

Krm 520: Land Degradation And Productivity Management

Course:Bachelor Of Science In Land And Water Management

Institution: Kenyatta University question papers

Exam Year:2012

KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2011/2012
INSTITUTIONAL BASED PROGRAMME (IBP) – DECEMBER SESSION
EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN LAND AND
WATER MANAGEMENT

KRM 520: LAND DEGRADATION AND PRODUCTIVITY MANAGEMENT

DATE: Friday, 4th May, 2012

TIME: 9.00 a.m. – 12.00 p.m.
---------------------------------------------------------------------------------------------------------------------
INSTRUCTIONS:

Answer question ONE and any other THREE Questions.

1.
(a)
What is land degradation?

[2 Marks]
(b)
State two (2) irrigation problems and explain how each affect crop growth.

[4 Marks]
(c)
Apart from irrigation issues, state six (6) types of land degradation processes.

[6 Marks]
(d)
Discuss the consequences of each degradation process on land productivity.

[14 Marks]
(e)
Identify soil quality factors that may be used to assess extent of land degradation.

[4 Marks]

2.
(a)
Discuss the environmental problems caused by deforestation.
[5 Marks]
(b)
How can deforestation be controlled?

[5 Marks]

Page 1 of 2

3.
Discuss how fertilizer application can be a cause of both land degradation and improved
productivity.

[5 Marks]

4.
What is the impact of erosion on soil degradation? Discuss.

[10 Marks]

5.
Study the information in the Table below ad answer the questions that follow

Soil type
pH(1:2 H2O)
ECe(dS/m)
S.A.R
Soil A
<8.5
>4.0
<13
Soil B
? 5
.
8
>4.0
>13-15
Soil C
>8.5
<4.0
>13-15
Soil D
<4.5
2-4
<13

(a)
Identify the main constraints to plant growth for each of these soils. [4 Marks]
(b)
Discuss the procedure you would follow to better manage these soils for increased
productivity.

[6 Marks]

Page 2 of 2

Krm 520: Land Degradation And Productivity Management Question Paper

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