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Nar0140:Soil Genesis And Classification Question Paper

Nar0140:Soil Genesis And Classification

Course:Diploma In Agriculture

Institution: Meru University Of Science And Technology question papers

Exam Year:2013

QUESTION ONE 30 MARKS
(a) Explain the meaning of the following terms: (i) Weathering (ii) Soil Mapping (iii) Lithification (iv) Soil taxonomy (v) Horizon (5Marks) (b) Explain how soil is a three phase system and name the phases. (3Marks) (c) Describe how both sedimentary and metamorphic rocks differ from the igneous rocks. (4Marks) (d) Explain four soil forming processes and given an example of each. (6Marks) (e) Discuss the physical weathering. (8Marks) (f) Explain how soil texture affects how growers use the soil. (4Marks)
QUESTION TWO 15 MARKS
(a) Explain the soil forming factors. (10Marks) (b) Describe the procedure used in the ribbon (feel) test of determining soil texture. (5Marks
2
QUESTION THREE 15 MARKS
(a) Distinguish between the following: (i) Peat and humus (ii) Peds and clods (iii) Master horizon and diagnostic horizon (iv) Active and passive remote sensing systems.
(10Marks) (b) Describe the United States Department of Agriculture (USDA) soil classification system.
(5Marks)
QUESTION FOUR 15 MARKS
(a) What is Cation Exchange Capacity? (1Mark) (b) Explain the importance of Cation Exchange Capacity. (4Marks) (c) Explain five ways of maintaining organic matter in the soil. (10Marks)
QUESTION FIVE 15 MARKS
a) Describe the formation of sedimentary rocks. (10Marks) b) Explain the characteristics of the B soil horizon. (3Marks) c) What is remote sensing? (2Marks)

Nar0140:Soil Genesis And Classification Question Paper

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