00000cam a22000004a 4500 UP-8027390931316246585 Buklod 20160302152946.0 a r |||| u| ta 980211s1998 miua r |000 0|eng d (iLib)UPMIN-00008184445 CaOOAG eng CaOOAG 633221 S589.7 M53 1998 Michigan field crop ecology managing biological processes for productivity and environmental quality. [East Lansing, Mich.] Michigan State University Michigan Agricultural Experiment Station 1998. vi, 86 p. ill. 28 cm. Michigan State University Extension bulletin E-2646 Field crops Ecology Michigan. Sustainable agriculture Michigan. Cultures de plein champ Ecologie Michigan. Agriculture durable Michigan. Michigan State University. Agricultural Experiment Station. UPMIN UPMIN-MAIN S589.7 M53 1998 Book