Welcome to European Tribune. It's gone a bit quiet around here these days, but it's still going.
See page five of the first PDF I mentionned above:

19. [...] Higher labour input decreases expenses on purchased inputs by some 40% but labour costs increase by 10 to 15 precent. The main benefit of organic systems is energy efficiency [...]

Yield increase is seen in subsistence agriculture, decrease elsewhere but on average estimate is "132% more than current food production levels"

by Laurent GUERBY on Sun Jul 15th, 2007 at 07:54:42 AM EST
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