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Ahs2208:Soil Genesis,Physics And Classication Question Paper

Ahs2208:Soil Genesis,Physics And Classication

Course:Bachelor Of Horticulture

Institution: Meru University Of Science And Technology question papers

Exam Year:2013

QUESTION ONE – 30 MARKS
a. Explain what is soil genesis. (4 Marks) b. Explain the factors that influence soil formation. (5 Marks) c. What are the sources of organic matter in soil. (8 Marks) d. Highlight the various physical weathering. (6 Marks) e. Explain the characteristics of A-horizon. (3 Marks) f. Explain the following: (4 Marks) i. Eluviations ii. Iluviation iii. Soil profile iv. Soil texture g. Explain how soil consistence is described and determined at the three moisture conditions. (wet soils, moist soils and dry soils) (3 Marks)
QUESTION TWO – 20 MARKS
a. Describe the characteristics of the soil orders according to USDA soil classification. (14 Marks) b. What are hydormorphic soils. (6 Marks)
QUESTION THREE – 20 MARKS
a. Explain how P-Horizon and E-Horizon occur in a soil profile horizonation. (4 Marks) b. Biological weathering is a soil developing process, rather than a soil forming process. Discuss. (8 Marks) c. Explain how you would determine the class textural of a soil using the textural triangle. (8 Marks)
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QUESTION FOUR – 20 MARKS
a. By using an illustration, describe the soil structure by types. (9 Marks) b. Explain how soil water is classified in relation to the plant growth. (4 Marks) c. Describe the factors that affect the water holding capacity of the soil. (7 Marks)
QUESTION FIVE – 20 MARKS
a. Explain the ways land is classified and characterized according it different capacity. (8 Marks) b. Explain the characteristics features of diagnostic surface epipedons. (10 Marks) c. How does soil colour influences the soil fertility of a place. (2 Marks)

Ahs2208:Soil Genesis,Physics And Classication Question Paper

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