| 000 | 00430 am a2200121 a 4500 | ||
|---|---|---|---|
| 100 | 1 | _aEnglehorn, A.J., and Others | |
| 245 | 1 | _aRole of nitrogen, phosphorus and potassium fertilizers in continuous corn culture on nicollet and webster soils | |
| 260 |
_aAmes _c1964 |
||
| 300 | _a1-17 p. | ||
| 942 |
_2udc _cB |
||
| 440 | _aCorn Iowa Agricultural and Home Economics Experiment Station. Research Bulletin No. 522 | ||
| 901 | _aS13413 | ||
| 999 |
_c113502 _d113502 |
||