| 000 | 00456 am a2200121 a 4500 | ||
|---|---|---|---|
| 100 | 1 | _aBeer, C.E., David, H.T., Shrader, W.D. | |
| 245 | 1 | _aReponse of corn yields in a planosol soil to surface drainage, cropping system and variable fertilizer treatments | |
| 260 |
_aAmes _c1961 |
||
| 300 | _a327-336 p. | ||
| 942 |
_2udc _cB |
||
| 440 | _aSoil. Corn, Fertilizer, Treartment Iowa Agricultural Experiment Station. Research Bulletin No. 499 | ||
| 901 | _aS3971 | ||
| 999 |
_c111914 _d111914 |
||