TY  - BOOK
AU  - Fenton T E
ED  - Iowa State University of Science and Technology. Agricultural and Home Economics Experiment Station
TI  - Special report: productivity levels of some Iowa soils
U1  - 630.72(777) 
PY  - 1971///
CY  - Iowa
PB  - Iowa State University
KW  - Agriculture
KW  - soils
KW  - Study and teaching
ER  -