A comparison of alternative manure management systems [microform]: effect on the environment, total energy requirement, nutrient conservation, and contributions to corn silage production and economics / Rodney O. Martin and David L. Matthews.
Format:
[microform]:
Publisher:
U.S. Environmental Protection AgencyRobert S. Kerr Environmental Research Laboratory ;
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.