Summary of specimen collection sites.
收藏Figshare2015-12-03 更新2026-04-29 收录
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Historical location is an estimate from museum records and contemporary locations are the coordinates of the sampled field. Percent corn and soybean in 2012 is based on National Agricultural Statistics Service numbers (nass.usda.gov). The number of acres of land planted to corn or soybean was divided by the recorded size of each county in which sampling occurred.Summary of specimen collection sites.
创建时间：
2015-12-03
