Change in the number of milkweed stems and milkweed resource in agricultural fields and non-agricultural habitats from 1999 to 2014 for Iowa (stems and milkweed resource in millions).
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Change in the number of milkweed stems and milkweed resource in agricultural fields and non-agricultural habitats from 1999 to 2014 for Iowa (stems and milkweed resource in millions).
创建时间：
2017-07-15
