This post caught me in a (thankfully) rare flight of pessimism. I had just
finished reading an article (http://www.theoildrum.com/node/ 3702#more) that
shows how the average yield of grains per hectare has gone from 1 1/4 tons
(metric) when I was a child to more than 3 tons now of days and it has done this
by genetic skulduggery and artificial nitrogen fertilizer.
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