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The denizens of soil scientists mapping the astonishingly productive and widely varied soils of California have included several famous and a few brilliant amongst hundreds of hardworking men and women. Up and down the mountains and valleys of California they have traversed to uncover, and then record for others, the secrets of the soil.
| Decade | Overview |
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| 1800s | Hilgard at UC Berkeley. Formation of the Bureau of Soils. | |
| 1900s | Hilgard debates Bureau Chief Whitney about Soil Properties. Macy Lapham Records early California Soil Mapping Activity. |
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| 1910s | Charlie Shaw coordinates Cooperative Agreement between Division of Soils and University of California. Reconnaisance Surveys Completed. | |
| 1920s | Soil Classification for California developed by Charlie Shaw. Detailed soil mapping in many counties. |
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| 1930s |
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| 1940s |
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| 1950s |
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| 1960s |
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| 1970s |
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| Dedicated to the education, application, and advancement of soil science in California. | ||||
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Professional Soil Scientists Association of California |
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Copyright © 2008 PSSAC |
PSSAC is affiliated with the American Registry of Certified Professionals in Agronomy, Crops and Soils (ARCPACS). |