Fertilizer Classifications

1
Fertilizer Classifications

• Organics
• Natural organics
• Major animal materials
• Synthetic organics
• Processed organics

• Inorganics
• Super phosphate
• Ammonium nitrate
• Ammonium sulphate
• Ammonium phosphate

2
Natural Organics

• Seed meals
• Cotton
• Soybean
• Green manures
• Mustard
• Vetch
• Peas

• Straws
• Cereals
• Beans
• Forest products
• Barks
• Sawdust
• Humus

3
Major Animal Materials

• Bloodmeal
• Hoofs and horns
• Bonemeal

• Tankage
• Manure
• Solid
• Liquid

4
Synthetic Organics

• Urea
• Urea-formaldehyde
• Biuret
• Sulfur - coated urea

5
Processed Organics

• Sewage sludge
• Processed crop residues
• Cannery wastes

6
Organics

• 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.

7
Inorganics

• 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.