K.A Barbarick American Society of Agronomy text USA American Society of Agronomy 1997 March-April 227p. : ilus ; 28 cm (06)631 (06)631 AME a 0002-1969 0002-1962 220413 20220413010125 INLIS000000000002559 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)