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Politics : Politics of Energy
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To: Hawkmoon who wrote (9090)6/5/2009 8:04:05 PM
From: Eric  Read Replies (1) of 86356
 
The likely cause of the problem is the LACK of nutrients, probably due to man's EXTENSIVE GLOBAL SOIL CONSERVATION efforts which has to led to tremendous increases in crop yields.

Before we started plowing up the Great Plains 150 years ago soil erosion was actually very low in this country. Most erosion happens along river banks. That has decreased over the years, especially on the Mississippi river do to "armoring" and dyking of river banks. Also damming rivers decreases silt flow to oceans.

Active farming actually increases total soil erosion.
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