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Last week’s column asserted that soil is the foundation of our agricultural industry and a scarce resource. This week let’s start to examine why. First, 70% of the surface of the earth is covered with water. Of the remaining 30%, only 11% is considered arable, suitable for farming, or approximately 3.3% of the total of the earth’s surface. Of that total, well over half has been degraded to some extent. Often that degradation is due ...
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