Healthy soil and sustainable growing

["TradingPostPaul" <tradingpost@riseup.net>]

Still no free lunch : nutrient levels in U.S. food supply eroded by pursuit
of high yields

Description     This report from the Organic Center suggests that nutrient
density, the concentration of nutrients in a given volume of food, has
declined in past decades as crop yields and animal production has
increased. Comparisons of historic crop with modern high yield varieties
provide evidence of lowered nutritive efficiency as crop breeders and
researchers have focused on varieties producing higher yields in response
to grower and market demand. The report questions the intrinsic value of
this process in the light of evidence of falling nutrient values; it
suggests that improving the nutritional quality of food crops is an
important element in tackling nutritional and health problems rather than
drug-based therapies. The 48-page report, issued in September 2007, was
written by Brian Halliwell of the Worldwatch Institute, and contains
substantial references and appendices.

entire report
http://www.organic-center.org/reportfiles/Yield_Nutrient_Density_Final.pdf
[English]