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Located in Emmetsburg, Iowa, Montag Mfg. is a family owned business focused on delivery systems for dry fertilizer begun when Roger Montag received a patent for dry fertilizer meter in 1988. That followed with the development of the steerable cart in 1999, which led to the incorporation of Montag Mfg. in 2005. Montag manufactures and sells complete fertilizer systems, dry fertilizer metering systems, liquid fertilizer systems and auto-steer carts.