| 000 | 00459 am a2200121 a 4500 | ||
|---|---|---|---|
| 100 | 1 | _aBeer, C.E., Johnson, H.P., Shrader, W.D. | |
| 245 | 1 | _aYield response of corn in a planosol soil to subsurface drainage with variable tile spacing | |
| 260 |
_aIowa _c1965 |
||
| 300 | _a563-574 p. | ||
| 942 |
_2udc _cB |
||
| 440 | _aYield, Corn, Planosol, Soil, Drainage Iowa Agricultural And Home Economics Experiment Station. Research Bulletin No. 540 | ||
| 901 | _aS13434 | ||
| 999 |
_c101005 _d101005 |
||