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Procedures used by OSU Soil, Water and Forage Analytical Laboratory
(Oklahoma Cooperative Extension Service, 2018-05)
Oklahoma agricultural soil test summary 2014-2017
(Oklahoma Cooperative Extension Service, 2018-05)
What soil, forage or water test do you need?
(Oklahoma Cooperative Extension Service, 2018-06)
Oklahoma forage and pasture fertility guide
(Oklahoma Cooperative Extension Service, 2018-02)