Soil Science 315

Problem Set 9

Monday, March 27, 2006

Due Friday March 31 at 2:25 PM

Redo Due Wednesday, April 5 at 2:25PM

Instructions: You may discuss the problems with anyone but the final work should be done independently. Respond to each question precisely as instructed by the question. For example, if the question says explain one reason only explain one reason even if you know many reasons and if the question asks you to calculate a volume do not give a mass. Be sure to label all numeric answers with the correct units. Each problem will be marked as accepted or “re-do”. There are no “re-do’s” of “re-do’s”. Re-do’s” are not accepted if an “honest” attempt was not submitted on the original due date. All portions of each problem set must be accepted to receive credit for the entire set. When submitting a problem set be sure to indicate the problem set number and if the submission is a “re-do” in the upper right corner.

1. Explain one similarity between saturated and unsaturated water flow in soil.

2. Radon is found in soil as a gas. Since modern airtight buildings permit little exchange of air with outside, radon can accumulate to harmful levels. How high can the concentration of radon gas in a house get? Explain.