The world’s largest study into sustainable agriculture has been published by Jules Petty of the University of Essex. He analyzed over 200 projects in 52 countries. More than four million farmers were involved, covering an area the size of Italy – three per cent of all fields in the Third World. Remarkably, average increases in crop yields were 73 per cent.
*New Scientist* vol 169 no 2276This first appeared in our award-winning magazine - to read more, subscribe from just £7



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