Principles of ecology in plant production / edited by T.R. Sinclair and F.P. Gardner. Sinclair, Thomas R., 1944- Gardner, Franklin P. (Franklin Pierce), 1924- Crops Ecology. SB91 .P78 1998 581.7 21 PRI Includes bibliographical references and index. Oxon [England] ; New York, NY : Cab International, c1998. c1998. 1998 Text x, 189 p. : http://www.loc.gov/catdir/enhancements/fy0604/97033999-d.html http://www.loc.gov/catdir/enhancements/fy0604/97033999-t.html eng