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:2012
QUESTION ONE (30 MARKS)
a. Describe eight uses of soil (8 Marks) b. Explain the chemical processes of soil weathering (6 Marks) c. Briefly explain the factors that influence the soil formation (5 Marks) d. Highlight the various soil orders according to the USDA soil taxonomy (6 Marks) e. What do you understand by the following terms: i. Soil profile ii. Edaphology iii. Elluviation iv. Plasticity of the soil v. Soil texture (5 Marks)
QUESTION TWO (15 MARKS)
a. Explain five application of remote sensing on land (5 Marks) b. Outline the characteristics of 0-horizon in the soil profile (4 Marks) c. By the use of illustrations explain the various types of soil structures ( 6 Marks)
QUESTION THREE (15 MARKS)
a. Explain how soil consistence can be determined at i. In wet soils ii. In moist soils iii. In dry soils (9 Marks) b. Explain the significance of soil colour as a physical property (6 Marks)
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QUESTION FOUR (15 MARKS)
a. Explain how water is held in the soil (7 Marks) b. Explain the various classification of soil water in relation to plant growth (8 Marks)
QUESTION FIVE (15 MARKS)
a. Explain the sources of acidity in the soil (6 Marks) b. Explain the influences of cation exchange capacity (CEC) in the soil (9 Marks)
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