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| Agricultural experiment stations--Mississippi (15) |
| Cotton--Fertilizers--Mississippi (15) |
| Corn--Fertilizers--Mississippi (3) |
| Cotton--Varieties--Mississippi (2) |
| Boll weevil--Control--Mississippi (1) |
| Cotton--Mississippi--Field experiments (1) |
| Cowpea--Fertilizers--Mississippi (1) |
| Fertilizers--Mississippi (1) |
| Mulching (1) |
| Nitrogen fertilizers (1) |