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In the United States, the EPA and the United States Geological Survey (USGS) are the principal federal agencies working with the CEC to define and map ecoregions. Ecoregions may be identified by similarities in geology , physiography , vegetation , climate , soils , land use , wildlife distributions, and hydrology .
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The dissected irregular plains and gently rolling low hills of the Southern Hilly Gulf Coastal Plain ecoregion developed over diverse east–west trending bands of sand, clay, and marl formations. Broad cuestas with gentle south slopes and steeper north-facing slopes are common, and the heterogeneous region has a mix of clayey, loamy, and sandy ...
Drought conditions in the Northern Plains and Southwest are expected to persist. Meanwhile, new drought developments are likely for parts of the Southern Plains and Florida.
The 2023 USDA plant hardiness zone map, which shows which areas of the country are suitable for growing plants and crops based on the lowest temperatures during the growing season.
Most of the southeastern part of the United States is dominated by the humid subtropical climate (Cfa/Cwa). As one nears the southern portion of Florida, the climate gradually becomes tropical, as the winter season and all months have a mean temperature above 64.4 °F (18.0 °C) (the defined coldest monthly mean temperature of tropical climates).
West of 100°W, much of the U.S. has a cold semi-arid climate in the interior upper western states (Idaho to the Dakotas), to warm to hot desert and semi-arid climates in the southwestern U.S. East of 100°W, the climate is humid continental in northern areas (locations roughly above 40°N, Northern Plains, Midwest, Great Lakes, New England ...
Todey said more study is necessary to understand how climate change will shape corn sweat, saying rainfall, crop variety and growing methods can all play a part.