With the help of this guide, you can use obtained test results to evaluate the fertility status of soils and the nutrient element status of plants for crop production purposes. It serves as an instructional manual on the techniques used to perform chemical and physical characteristic tests on soils. Laboratory Guide for Conducting Soil Tests and Plant Analysis describes the basis and procedures for each test in detail, including analytical instrumentation procedures and laboratory quality assurance requirements.Preface INTRODUCTION Reference Methods Reagents, Standards, and Water Elemental and Compound Designation Other Considerations Interpretation of a Soil Test/Plant Analysis Result Units Disclaimer SOIL ANALYSIS (TESTING) History and Purpose Sequence of Procedures Sampling Transport to the Laboratory Preparation of the Laboratory SampleWeighing versus Scooping Sample Aliquot Determination Laboratory Factors Long-Term Storage Soil pH Soil Buffer pH Extractable ElementsPhosphorus Major Cations (K, Ca, Mg, and Na) Micronutrients (B, Cl, Cu, Fe, Mn, and Zn) Trace Heavy Metals Extractable Nitrate-Nitrogen Extractable Sulfate-Sulfur Testing Organic Soils and Soilless Media Organic Matter and Humic Matter Content Determinations Soluble Salt Determination Soil Texture (Mechanical Analysis)Special Tests Testing Organic Soils and Soilless Media Total Analysis PLANT ANALYSIS Purpose Sampling Sample PreparationPlant Tissue Preparation Elemental Analysis for the Mineral Elements Total Nitrogen Determination Total Sulfur Determination Methods for Expressing Elemental Content Interpretation of Results Decontamination Oven Drying Grinding Organic Matter Destruction Laboratory Analysis of Plant Digest Extracl³›