00374nam a22001217a 4500003000400000005001700004008004100021020001500062040000700077100005300084245008400137260003100221OSt20170224125608.0170224b        xxu||||| |||| 00| 0 eng d  a0866912290  cRU  aJohn C Siemens, Robert G. Hoeft, Arland W. Pauli  aSoil managementbA useful guidebook for farm managers with common soil problems  aUSAbDeere & Companyc1993