May 17, 2011
"Do civilizations fall because the soil fails to produce—or does a soil fail only when the people living on it no longer know how to manage their civilization?"

— Charles Kellogg, “Soils and Men”, 1938.

8:26am  |   URL: http://tmblr.co/Ztfxby5CHATA
  
Filed under: agriculture history 
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