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Four Cover Crops Dual-Cropped with Soybean: Agronomics, Income, and Nutrient Uptake Across Minnesota

Many agricultural watersheds in Minnesota have toxic levels of phosphorus and nitrogen, much of which originates in agricultural fields that are fallowed from October through May. Autumn-sown winter cover crops can be used to retain these nutrients. Soil NO3-N levels and and quantities of N sequestered by winter rye (Secale cereale), Tillage Radish®(Raphanus sativus), and the oilseed crops, winter camelina (Camelina sativa), and pennycress (Thlaspi arvense) were evaluated in a relayed cover crop/soybean production system at three sites spanning the north-south climatic gradient of Minnesota.

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