A Review of Long-Term Organic Comparison Trials in the U.S.

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Iowa results can be found on page 6: ”Over 13 years, LTAR organic corn and soybean yields were equivalent or greater than conventional counterparts. Unlike many studies where organic yields suffer during the transition phase, the first LTAR transitioning-to-organic phase demonstrated corn yields in the organic system that were 92% of conventional corn yields while organic soybean yields were 99.6% of conventional soybean yield…Economic returns mirrored those previously reported at other sites, with the organic rotations garnering, on average, twice the returns of the conventional rotation, and lower costs than conventional crops during transition.”

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