TY  - BOOK
AU  - Walsh, Leo M., ed.
AU  - Beaton, J D, ed.
TI  - Soil testing and plant analysis
U1  - 631.412/WAL 
PY  - 1973///
CY  - Madison
PB  - Soil Science Society of America, Inc.
KW  - soil analysis
KW  - soil fertility
ER  -