Media type: E-Article Title: Tree canopy effect on grass and grass/legume mixtures in eastern Nebraska Contributor: Perry, Michael E. L.; Schacht, Walter H.; Ruark, Gregory A.; Brandle, James R. Published: Springer Science and Business Media LLC, 2009 Published in: Agroforestry Systems, 77 (2009) 1, Seite 23-35 Language: English DOI: 10.1007/s10457-009-9234-x ISSN: 0167-4366; 1572-9680 Origination: Footnote: