Bureau of Feed, Seed & Fertilizer Laboratories
Fertilizer Methods of Analysis
Introduction: Official samples of commercial fertilizer and agricultural liming materials are collected and analyzed to ensure that they meet the standards set forth in the Florida Commercial Fertilizer Law, Chapter 576, Florida Statutes and Chapter 5E-1, Florida Administrative Code (F.A.C.). Chapter 5E-1.014, F.A.C., references the methods of analyses and states that all methods of analyses for fertilizers shall be those in the State of Florida, Department of Agriculture and Consumer Services, Fertilizer Manual. Copies of this manual may be obtained from the Division of Agricultural Environmental Services, Bureau of Feed, Seed and Fertilizer Laboratories, 3125 Conner Boulevard, Building 7, Tallahassee, FL 32399-1650.
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Table of Contents
100 |
INTRODUCTION |
200 |
SAMPLE PREPARATION |
| Appendix A (pdf) | |
| 300 | MICROSCOPY |
| Appendix B (pdf) | |
| 400 | NITROGEN ANALYSIS |
| 405 - Total Nitrogen – Kjeldahl (pdf) | |
410 - Total Nitrogen - Combustion (pdf) |
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415 - Ammoniacal Nitrogen (Urea Present) – Direct (pdf) |
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420 - Ammoniacal Nitrogen (Urea Not Present) – Direct (pdf) |
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425 - Other Water Soluble Nitrogen – Direct (pdf) |
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430 - Breakdown Nitrogen Preparation (pdf) |
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435 - Ammoniacal Nitrogen (Urea Present) – Kjeldahl (pdf) |
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440 - Other Water Soluble Nitrogen – Kjeldahl (pdf) |
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445 - Water Insoluble Nitrogen – Kjeldahl (pdf) |
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450 - Nitrate Nitrogen – Continuous Segmented Flow (ARCHIVED) |
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451 - Nitrate Nitrogen – Flow Injection (pdf) |
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452 - Nitrate Nitrogen – Flow Injection - Environmental (pdf) |
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455 - Ammoniacal Nitrogen – Continuous Segmented Flow (ARCHIVED) |
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460 - Urea Nitrogen – Continuous Segmented Flow (ARCHIVED) |
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461 - Urea Nitrogen–Flow Injection Dimethylaminobenzaldehyde (ARCHIVED) |
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462 - Urea Nitrogen – Flow Injection by Urease (pdf) |
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470 - Ammoniacal Nitrogen – Flow Injection (ARCHIVED) |
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| 471 - Ammoniacal Nitrogen (Improved) – Flow Injection (pdf) | |
| 472 - Ammoniacal Nitrogen - N - Surface and Waster Water - Flow Injection (pdf) | |
| 500 | PHOSPHATE ANALYSIS |
501 - Phosphate – Continuous Segmented Flow (ARCHIVED) |
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502 - Available Phosphorus – Segmented Flow (pdf) |
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503 - Available Phosphorus (Dual Extraction) – Segmented Flow (pdf) |
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510 - Indirect Available Phosphorus (pdf) |
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520 - Total Phosphorus - Segmented Flow (pdf) |
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531 - Ortho-Phosphate – P – Surface and Waste Water – Flow Injection (pdf) |
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540 - Citrate Insoluble Phosphorus – Segmented Flow (pdf) |
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600 |
POTASH ANALYSIS |
601 - Potash - AA (pdf) |
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610 - Chlorine (pdf) |
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700 |
CONTROLLED RELEASE FERTILIZER PREPARATION |
701 - Nitrogen (pdf) |
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800 |
SECONDARY/MICRONUTRIENT ANALYSIS |
801 - Boron – Automated Azomethine (pdf) |
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802 - Boron – Titrimetric (ARCHIVED) |
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803 - Boron - ICP (pdf) |
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805 - Sulfur – Total (Combined) (pdf) |
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806 - Sulfur – Free (pdf) |
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810 - Magnesium – Water Soluble - AA (pdf) |
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| 811 - Magnesium - Total - AA (pdf) | |
812 - Magnesium – Water Soluble – ICP (pdf) |
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820 - Total Secondary/Micronutrient Elements – AA (pdf) |
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821 - Calcium – Total - AA (pdf) |
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822 - Secondary/Micronutrient Elements - Total - ICP (pdf) |
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830 - Manganese – Soluble - AA (pdf) |
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831 - Copper – Soluble - AA (pdf) |
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832 - Iron – Soluble - AA (pdf) |
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833 - Zinc – Soluble - AA (pdf) |
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840 - Iron Chelate – Pure Material - AA (pdf) |
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841 - Secondary/Micronutrient Elements - Chelated ~ AA (pdf) |
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860 - Gypsum – AA (pdf) |
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870 - Dolomite/Limestone - AA (pdf) |
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871 - Dolomite/Limestone – Calcium Carbonate Equival (CCE) (pdf) |
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875 - Dolomite/Limestone ~ ICP (pdf) |
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900 |
HEAVY METALS ANALYSIS |
901 - Arsenic, Cadmium, Chromium, Cobalt, Lead, Molybdenum, Nickel, and Zinc ~ ICP (pdf) |
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902 - Arsenic, Cadmium, Chromium, Cobalt, Lead, Molybdenum, Nickel, Selenium and Zinc ~ ICP (pdf) |
