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Fertilizer Classifications

Organics Natural organics Major animal materials Synthetic organics Processed organics. Inorganics Super phosphate Ammonium nitrate Ammonium sulphate Ammonium phosphate. Fertilizer Classifications. Seed meals Cotton Soybean Green manures Mustard Vetch Peas. Straws Cereals Beans

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Fertilizer Classifications

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  1. Organics Natural organics Major animal materials Synthetic organics Processed organics Inorganics Super phosphate Ammonium nitrate Ammonium sulphate Ammonium phosphate Fertilizer Classifications

  2. Seed meals Cotton Soybean Green manures Mustard Vetch Peas Straws Cereals Beans Forest products Barks Sawdust Humus Natural Organics

  3. Bloodmeal Hoofs and horns Bonemeal Tankage Manure Solid Liquid Major Animal Materials

  4. Synthetic Organics • Urea • Urea-formaldehyde • Biuret • Sulfur - coated urea

  5. Processed Organics • Sewage sludge • Processed crop residues • Cannery wastes

  6. Advantages Soil tilth improvement. Water holding capacity increased. Cation exchange capacity increased. Disadvantages Low concentration of nutrients.. Difficult to determine exact amounts of nutrients provided. Organics

  7. Advantages Small amount of fertilizer needed per nutrient provided. Easy to handle. Ability to determine the exact amount of nutrient provided. Disadvantages Expensive. May burn crop if not used correctly. Leaching of nitrates into groundwater. May be toxic to people who apply them. Inorganics

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