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SW MN and Gold Canyon AZ | Soybeans are daylight sensitive so heat unit accumulation and GDU's are worthless. Corns a different story.
The map is right for soybeans but would not work for corn using straight lines across the corn belt.
Anyone that lives in SW MN and eastern S.D. knows about the buffalo ridge. Worthington and pipestone get less heat units than redwood falls and other areas around the MN river which are North of us. 100 day corn is max for us but 1.9, 2.0 beans work about right. MN river area and fairmont east can run 105 day maturities but the same soybeans. Those areas are done planting corn and harvesting usually before we even get started. Its another reason you don't see much no-till anything in our area.
The ridge is an area of higher elevation and higher wind speeds thus cooler nights. Its why you see all the windmills in our area. In 20 years I expect windmills will cover our area totally. | |
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Soybean maturity map for North America
