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Aee2355:Soil Science Question Paper

Aee2355:Soil Science

Course:Bachelor Of Crop Protection

Institution: Meru University Of Science And Technology question papers

Exam Year:2013

QUESTION ONE – 30 MARKS
(a) Explain the following terms on soil science understanding point of view (i) Pedology (ii) Soil texture (iii) Eluviation (iv) Colluvium (v) Horizon (b) By giving two examples in each case, explain the characteristics and formation of the following rocks: (i) Igneous rocks (ii) Sedimentary rocks (iii) Metamorphic rocks (10marks) (c) Explain the chemical processes of rocks weathering. (10Marks) (d) Describe the B soil master horizons. (3Marks) (e) Explain the significance of colour in soil (2Marks)
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QUESTION TWO – 20 MARKS
(a) Explain how you would use the soil textural triangle to determine the soil classes of a sampled soil. (10Marks) (b) Explain how the soil forming factors influence the formation of soil in regions. (10Marks)
QUESTION THREE – 20 MARKS
(a) Describe the various soil orders according to the USDA soil taxonomy. (12Marks) (b) By using an illustrations, explain soil structures by types. (6Marks) (c) Explain any four agricultural uses of soil (2Marks)
QUESTION FOUR – 20 MARKS
(a) Describe soil consistence at wet, moist and dry soil conditions. (8Marks) (b) Explain the interaction phenomenon between soil water and soil air in the pedosphere. (6Marks) (c) Explain how loess, alluvial fans and marine sediments parent materials are formed. (6Marks)
QUESTION FIVE – 20 MARKS
(a) Describe the eight classes of soils according to land capability classifications. (8Marks) (b) Explain the effects of soil organic matter. (8Marks) (c) Why is biological weathering considered as a soil developing process and not a formation process? (4Marks)

Aee2355:Soil Science Question Paper

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