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- United States. Bureau of Soils4
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- Maxon, E. T. (Earl Terry), b. 18893
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- Sweet, A. T. (Arthur T.), 1869-19163
- Baldwin, Mark, 1889-2
- Bennett, Hugh H. (Hugh Hammond), 1881-19602
- Britton, J. C.2
- Moon, John W. (Joseph Worley), 1891-2
- Phillips, S. W. (Samuel William), 1894-19332
- Taylor, Arthur E. (Arthur Elijah), b. 18772
- Winston, R. A. (Robert Alonzo), b. 18782
- Allen, Risden T.1
- Beesley, Thomas E. (Thomas Edward), 1908-1
- Bushnell, T. M. (Thomas Mark), b. 18891
- Ely, Charles W.1
- Fowler, Earl D. (Earl Donald), b. 18901
- Hall, E. C.1
- Hasty, A. H. (Allen Henry), 1895-1
