Some regions report increases in some crops and positive financial returns have been reported for genetically modified cotton in studies including South Africa, Argentina, China, India and Mexico. In contrast, the US and Argentina may have slight yield declines in soybeans, and also for maize in the US. Studies on GMOs have also shown the potential for decreased insecticide use, while others show increasing herbicide use.
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From collection: IAASTD - International assessment of agricultural science and technology for development
IAASTD/Ketill Berger, UNEP/GRID-Arendal