Integrated crop-livestock system effects on soil N, P, and pH in a semiarid region Liebig, M. A. ; Ryschawy, J. ; Kronberg, S. L. ; Archer, D. W. ; Scholljegerdes, E. J. ; Hendrickson, J. R. ; Tanaka, D. L. Abstract Publication: Geoderma Pub Date: March 2017 DOI: 10.1016/j.geoderma.2016.11.036 Bibcode: 2017Geode.289..178L