Soil and Plant Analysis Laboratory Manual

1. Introduction (40KB)

2. Soil and Plant Sampling, and Processing (72KB)

2.1 Soil
2.2 Plant

3. Laboratory Facilities, Quality Control, and Data Handling (85KB)

3.1 Laboratory Organization
3.2 Laboratory Safety
3.3 Quality Control and Standardization Procedures
3.4 Data Processing

4. Soil Physical Analysis (150KB)

4.1 Soil Moisture Content
4.2 Particle Size Distribution
4.3 Saturated Paste
4.4 Field Capacity Moisture and Permanent Wilting Point

5. Soil ChemicaL Analysis (87KB)

5.1 pH
5.2 Electrical Conductivity
5.3 Calcium Carbonate
5.4 Organic Matter
5.5 Cation Exchange Capacity
5.6 Gypsum

6. Soil Nutrients Sodium and Anion Analysis (240KB)

6.1 Nitrogen

6.1.1 Kjeldahl Nitrogen
6.1.2 Total Nitrogen
6.1.3 Mineral Nitrogen
6.1.4 Nitrate-Nitrogen
6.1.5 Microbial Biomass Nitrogen and Carbon

6.2 Phosphorus

6.2.1 Extractable Phosphorus
6.2.2 Total Phosphorus
6.2.3 Organic Phosphorus

6.3 Potassium

6.3.1 Extractable Potassium
6.3.2 Soluble Potassium
6.3.3 Exchangeable Potassium

6.4 Sodium
6.5 Calcium and Magnesium
6.6 Carbonate and Bicarbonate
6.7 Chloride
6.8 Sulfate

6.8.1 Turbidimetric Method
6.8.2 Precipitation Method

6.9 Boron

6.9.1 Hot-Water Method
6.9.2 Dilute Hydrochloric Acid Method

6.10 Micronutrient Cations

6.10.1 DTPA Method
6.10.2 Ammonium Bicarbonate-DTPA Method

7. Plant Analysis (127KB)

7.1 Nitrogen

7.1.1 Kjeldahl Nitrogen
7.1.2 Nitrate-Nitrogen
7.1.3 Total Nitrogen

7.2 Phosphorus
7.3 Macro- and Micro-nutrients by Dry Ashing
7.4 Boron
7.5 Micronutrients analysis by Wet Digestion
7.6 Ferrous Analysis in Fresh Plant Tissue
Box 1: Influence of pH ON plant Nutrient Availability
Box 2: Soil-Plant Analysis by Automated Laboratory Equipment
Box 3: Soil and Water Analysis for EnvironmentalL Pollution
Box 4: Irrigation Water Quality

8. References (49KB)

9. Supplementary Reading (86KB)

Appendix 1. Abbreviations
Appendix 2. Conversion Factors for SI and Non-SI Units
Appendix 3. Symbols, Atomic Number, and Atomic Weights of Elements
Appendix 4. Solution Concentrations
Appendix 5. Some Useful Relationships
Appendix 6. Concentration, Normality, and Amount of Concentrated Acids and Bases to Make 1-L of 1 N Solution
Appendix 7. Soil pH Levels and Associated Conditions
Appendix 8. Summarized Soil Test Methods for Fertility Evaluation of Alkaline Soils
Appendix 9. Generalized Guidelines for Interpretation of Soil Analysis Data
Appendix 10. Suggested Plant Tissue Sampling Procedures for Selected Dryland Crops Appendix 11. Generalized Interpretation of Cereal Tissue Analysis Data
Appendix 12. Classification Criteria for Salt-Affected Soils
Appendix 13. Soil Salinity Classification
Appendix 14. Relative Salt-Tolerance Limits of Crops
Appendix 15. Relative Tolerance of Species to Boron Toxicity
Appendix 16. Mesh Sizes of Standard Wire Sieves
Appendix 17. Equivalent Weights

Cover

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