6WKEX-07-B

6WKEX-07-B - NAME SOIL SCIENCE 322 Physical Principles of Soil and Water Management 6-Weeks Exam March 1 2007 1(10 points Soil is a product of

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NAME: SOIL SCIENCE 322 Physical Principles of Soil and Water Management 6-Weeks Exam March 1, 2007 1. (10 points) Soil is a product of weathering (chemical, mechanical, and biological) of rocks and other parent material. It is a three phase system composed of solid, liquid and gas. Are there situations where not all three phases are present? Explain, and include in your discussion the status of the soil pore space. 2. (5 points) Explain what happens when a dry soil aggregate is rapidly wetted.
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2 3. (20 points) You are given a job to determine the water content of the soil under turfgrass on a lawn. You decide to obtain a soil sample from the top 20 cm of soil, from a carefully selected point on the lawn with a cylindrical sampler. The cylinder has a diameter of 3" and is 3" high. The following information was developed from laboratory analysis of your sample: Wet weight 660 g Dry weight 580 g The sampling cylinder weighs 165 g. (1 in = 2.54 cm) Calculate the following: g a) gravimetric water content, è v b) volumetric water content, è
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This note was uploaded on 08/08/2008 for the course SS 322 taught by Professor Lowery during the Spring '08 term at Wisconsin.

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6WKEX-07-B - NAME SOIL SCIENCE 322 Physical Principles of Soil and Water Management 6-Weeks Exam March 1 2007 1(10 points Soil is a product of

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