NATIONAL OPEN UNIVERSITY OF NIGERIA

University Village, Nnamdi Azikwe Express Way, Plot 91, Cadastral Zone, Jabi, Abuja

Faculty of Agricultural Sciences

June/July 2017 Examination

COURSE CODE: SOS303
COURSE TITLE: – INTRODUCTION TO PEDOLOGY AND SOIL PHYSICS
INSTRUCTION: – ATTEMPT ANY FOUR QUESTIONS IN 2 HOURS
Question 0ne
a) What is the agricultural definition of the soil?
b) List the importance of soil to man
c) List the three 3 basic types of soils focusing the percentage particle size composition,
Question Two
a)     Describe the structure call Rock
b)    List the  type of rocks
c)     Write a short descriptive note on rocks formed as a result of sedimentation and give 3 examples of rocks formed from such actions.
 
Question Three
a)     What is weathering
b)    List five agents of biological weathering.
c)     Write a comprehensive note on physical weathering
 
Question Four
a) Outline the components of i) chemical and ii) biological weathering
b)  Use passive and active factors to explain the soil formation
Question five
a)     Write a short note on i) soil texture (ii) soil permeability (iii) soil infiltration rate.
b)    List any 3 soil s reactions
Question Six
a) Discuss the importance of soil amendment to a crop producer.
b)  Write a short note on biological properties of the soil.
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Exam summary sample below