US CROP DIVERSITY. “Over 90% of the varieties grown 100 years ago are no longer in commercial production … In 1903, US seed catalogs listed 408 pea varieties; only 25 can be found now … and by 1970, just two pea varieties comprised 96% of the US commercial crop. 71% of US corn acreage in 1991 was planted to just six varieties.”
http://people.oregonstate.edu/~muirp/cropdiv.htm
linkedin post 2022-06-29 05:12:48
Nigel Fleming
September 21, 2022