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The Wisconsin Soil Test Recommendation Program

The Wisconsin Soil Test Recommendation Program

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The Wisconsin Soil Test Recommendation Program

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  1. The Wisconsin Soil Test Recommendation Program UWEX Publication A2809: Nutrient Application Guidelines for Field, Vegetable, and Fruit Crops in Wisconsin

  2. A2809 – “The Bible” • Incorporates over 80 years of research • The official recommendations for NRCS 590 NMP • Supported by UW Soil Science Department • Two state-run labs • Uses local calibration • Continuously updated • Revised in 2006

  3. Philosophy of the Wisconsin Soil Test Recommendation Program • Establishes Soil Sampling and Testing Methods • Interprets Fertilizer and Lime Needs • Wide Range of Field Crops and Soils • Uses a Sufficiency Approach • Index of available nutrients • Degree of sufficiency for specific crops • Provide recommendation to correct • Allows economic and informed decision

  4. Soil Sampling Method for Single-Rate Nutrient Application

  5. UW Soil Testing Methods

  6. Soil Groups

  7. MRTN Guidelines for Corn

  8. Soil Test Categories for P and K

  9. P and K Fertilization Guidelines

  10. Sulfur Availability Index ● Soil test S ● Subsoil S ● Precipitation ● Organic matter ● Manure history

  11. Soil pH Management