Transcription of Fertilizer Recommendations Guide
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FertilizerRecommendations GuideReview and Revision: Jason Clark | Assistant Professor & SDSU Extension Soil Fertility SpecialistEC750 Original Authors: 2005 Jim Gerwing | Extension Soil Specialist Ron Gelderman | Soil Testing Program ManagerDepartment of Agronomy, Horticulture & Plant ScienceCollege of Agriculture, Food & Environmental SciencesContentsIntroduction ..1 Soil Test Categories ..1 Nitrogen ..1 Deep nitrate test ..1 Legume credits ..1 Manure credits ..2 Nutrient Recommendation Equations used by used by SDSU Extension ..3 Phosphorus and Potassium.
SDSU Extension fertilizer recommendations are based on field research in South Dakota and neighboring states . However, information from outside this region is used where only limited local data was available . ... (0.5 – (0.034 x STP)) x YG = (0.85 – (0.0057 x STK)) x YG.
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