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| | Soil, Erosion, Soil Loss, Soil Conservation (Site not responding. Last check: 2007-10-20) |
 | | According to soil conservation specialists in Iowa, approximately 16,000 pounds of soil per acre per year were being lost earlier due to wind and water erosion at the time when soil conservation practices were instituted in the 1970's. |
 | | In contrast, the 12,000 pounds per acre of soil being lost in the U.S. on the average annually is 0.0356 inch (approximately 1/28th of an inch) of soil over 1 acre. |
 | | Worldwide soil erosion rates are highest in Asia, Africa, and South America, averaging approximately 13 metric tons (exact figure: 26,768 pounds) to 17.5 metric tons (exact figure: 35,637 pounds) per acre per year. |
| www.growbiointensive.org /biointensive/soil.html (603 words) |
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