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- End year 1974 (our estimate)Likely, not confirmed2
- Scope: country: BoliviaLikely, not confirmed2
- Discontinuous models for rapid correlation, interpretation, and utilization of soil analysis and fertilizer response dataLikely, not confirmed1
- Rolled out under Richard NixonOur estimate2
- North Carolina State University. Dept. of Soil ScienceStated in a document2
- North Carolina State UniversityStated in a document1
- BoliviaStated in a document1
- AID/LA-646Stated in a document3
- AID/CSD-287Stated in a document1
- U.S. Agency for International Development (USAID)Stated in a document3
- Topics (4)Stated in a document4
- Start year 1973Stated in a document2