The Soil Analysis Handbook of Reference Methods is a standard laboratory technique manual for the most commonly used soil analysis procedures. Begun in 1974, this Handbook has changed over the years to reflect evolving needs. New test methods and modifications have been added, as well as new sections on nitrate, heavy metals, and quality assurance plans for agricultural testing laboratories. TOC:Preface. Contributors. Acknowledgments. Introduction. Sampling, and Sample Preparation, Measurement, Extraction, and Storage. Soil pH. Lime Requirement. Conductance, Soluble Salts, and Sodicity. Phosphorus. Major Cations (Potassium, Calcium, Magnesium, and Sodium). Micronutrients (Boron, Copper, Iron, Manganese, and Zinc). Heavy Metals. Nitrate and Ammonium. Sulfate-Sulfur. Chloride. Organic and Humic Matter. Organic Soils and Soilless Growth Media. Quality Assurance Plans for Agricultural Testing Laboratories. Methods of Instrumental Analysis. Index. Appendix.