| ID | 250347 |
| Call Number | X9J:240K7.7375/J5/051662 |
| Title Proper | Crop response surfaees and economic optima in fertilizer use |
| Language | ENG |
| Author | Heady Earl O. Etc. |
| Publication | Iowa State College, 1955. |
| Description | 40p |
| Series | Research Bulletion of Agr. Exp. Sta. Iowa State college No. 424 |
| Price. Qualification | GIPE Ex |
| Classification Number | X9J:240K7.7375 |