> Fig. 1. The U. S. Soil Conservation Service reports that the soil washed out and blown out of the fields of the United States each year would load a modern freight train long enough to reach around the world eighteen times. If it ran twenty miles an hour continuously, it would take it nearly three years to pass your station. We began with the richest of continents, but ...
https://journeytoforever.org/farm_library/smith/treecrops1.html#ch1
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