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- Bigham, J.M.
- Brown, J.R.
- Clay David E.
- Dane, Jacob H.
- Dixon, J.B.
- Douglas, Lowell A.
- International Sympos...
- McFee, William W.
- Shannon,D.Kant
- Sparks, D.L.
- Symposium held on 11...
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- Ulery, April L.
- Walsh, L.M.
- Walsh, Leo M.
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- FERTILIZER USE
- FOREST SOILS
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- PRECISION FARMING 2....
- SOIL - NITROGEN CONT...
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- TRACE ELEMENTS
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