| 21. | Soil surveys were conducted by the NRCS and site index was measured for these soils.
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| 22. | Work for soil surveys was done at a mapping scale 1 inch to the mile.
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| 23. | During the Great Depression, the soil survey efforts slowed.
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| 24. | Soil Survey Horizons published his concept in 1993.
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| 25. | A full list of suffixes is available online as part of the USDA Soil Survey Manual.
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| 26. | It was not until after the war in 1945 that the Soil Survey Division was reorganized.
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| 27. | Subsequent soil surveys after injection in 2002 to 2005 found levels dropped in these same regions.
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| 28. | National and international soil survey efforts have given the profession unique insights into landscape scale functions.
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| 29. | From 1982 to 1985, the first soil survey, land resources survey and cultural relics survey were conducted.
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| 30. | After graduating, he emigrated to New Brunswick, Canada, where he was employed by a government soil survey.
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