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Corn Stover Nutrient Removal Estimates For Central Iowa, Usa, Douglas Karlen, John Kovar, Stuart J. Birrell
Corn Stover Nutrient Removal Estimates For Central Iowa, Usa, Douglas Karlen, John Kovar, Stuart J. Birrell
Douglas L Karlen
One of the most frequent producer-asked questions to those persons striving to secure sustainable corn (Zea mays L.) stover feedstock supplies for Iowa’s new bioenergy conversion or other bio-product facilities is “what quantity of nutrients will be removed if I harvest my stover?” Our objective is to summarize six years of field research from central Iowa, U.S.A. where more than 600, 1.5 m2 samples were collected by hand and divided into four plant fractions: vegetative material from the ear shank upward (top), vegetative material from approximately 10 cm above the soil surface to just below the ear (bottom), cobs, and …