MARSHALLTOWN, Iowa — The way Iowans farm changes every year as new technology becomes available. Well, in Marshalltown, a pair of childhood friends have kick-started a new fertilizer spraying business ...
Nitrogen fertilizer requires fossil fuels to make and can damage the environment after it’s used. Kula Bio is using microbes to cleanly recreate the same process. Ordinarily, the bacteria that Kula ...
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