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Erc 101: Introduction To Soil Science Question Paper

Erc 101: Introduction To Soil Science

Course:Bachelor Of Education In Agriculture

Institution: Kenyatta University question papers

Exam Year:2012

KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2011/2012
MAY SEMESTER EXAMINATION FOR THE DEGREE OF BACHELOR OF ENVIRONMENTAL SCIENCE

ERC 101: INTRODUCTION TO SOIL SCIENCE

DATE: WEDNESDAY, 8TH AUGUST 2012 TIME: 11.00 AM - 1.00 PM

INSTRUCTIONS: ANSWER QUESTION ONE AND ANY OTHER THREE

1. a) Define the following

i) Pedogenesis
ii) Soil structure
iii) Soil consistence
iv) Essential nutrients
v) Land capacity

b) Explain five key roles soils play in the environment (10mks)
c) Explain the importance of soil structure (5mks)

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

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

4. 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)

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

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