1. N, P and K FertilizersUREA (Free flowing)
UREA (Granular)
AMMONIUM SULTE
CALCIUM AMMONIUM NITRATE (CAN)
SINGLE SUPERSTE (SSP) (Powdered)
SINGLE SUPERSTE (SSP) (Granular)
TRIPLE SUPERSTE (TSP)
POTASSIUM CHLORIDE/MURIATE OF POTASH (MOP) (Crystaler)
POTASSIUM CHLORIDE/MURIATE OF POTASH (MOP) (Granular)
POTASSIUM SULTE/SULTE OF POTASH (SOP)
DIAMMONIUM STE (DAP)
NPK COMPLEX 15-15-15
NPK COMPLEX 17-17-17
NPK COMPLEX 19-19-19
2. Micronutrient FertilizersZINC SULTE
CHELATED Zn, AS Zn-EDTA
MANGANESE SULTE
BORAX (SODIUM TETRABORATE)
COPPER SULTE
FERROUS SULTE
CHELATED IRON, AS Fe-EDTA
AMMONIUM MOLYBDATE
3. Rock ste (RP)/ste Rock (PR) for direct application4. Organic ManuresUREA (Free flowing) - Moisture content by weight: maximum 1%
- Total nitrogen content by weight (on dry basis): minimum 46%
- Biuret content by weight: maximum 1.5%
- Particle size: Not less than 90% of the material shall pass through 2.8 mm IS sieve and be retained on 1 mm IS sieve.  Not more than 5% shall be below 1 mm IS sieve
- Packing: Packed in 50 kg (dry) capacity woven polypropylene bags with polyethylene inner lining. 4% empty bags to be supplied at no extra cost
- Each bag to guarantee minimum product weight (net) as specified on the bag
- Marking: FAO logo, product name, active ingredient(s), net and gross weight, Project No., P.O. No. and final destination
UREA (Granular)NOTE: Only when specially requested (for machine application) as it is slightly more expensive than free flowing Urea
- Moisture content by weight: maximum 1%
- Total nitrogen content by weight (on dry basis): minimum 46%
- Biuret content by weight: maximum 1.5%
- Particle size: Not less than 90% of the material shall pass through 4 mm IS sieve and be retained on 2 mm IS sieve. Not more than 5% shall be below 1 mm IS sieve
- Packing: Packed in 50 kg (dry) capacity woven polypropylene bags with polyethylene inner lining. 4% empty bags to be supplied at no extra cost
- Each bag to guarantee minimum product weight (net) as specified on the bag
- Marking: FAO logo, product name, active ingredient(s), net and gross weight, Project No., P.O. No. and final destination
AMMONIUM SULTE - Moisture content by weight: maximum 1%
- Total nitrogen content by weight (on dry basis): minimum 20%
- Free acidity (as H2SO4) by weight: maximum 0.025%
- Sulr (as S) by weight: minimum 23%
- Particle size: Not less than 90% of the material shall pass through 2.8 mm IS sieve and be retained on 1 mm IS sieve. Not more than 5% shall be below 1 mm IS sieve
- Packing: Packed in 50 kg (dry) capacity woven polypropylene bags with polyethylene inner lining. 4% empty bags to be supplied at no extra cost
- Each bag to guarantee minimum product weight (net) as specified on the bag
- Marking: FAO logo, product name, active ingredient(s), net and gross weight, Project No., P.O. No. and final destination
CALCIUM AMMONIUM NITRATE (CAN) - Moisture content by weight: maximum 1%
- Total nitrogen content by weight (on dry basis): 26%
- Ammoniacal nitrogen by weight: 50% of total nitrogen
- Nitrate nitrogen by weight: 50% of total nitrogen
- Calcium and/or magnesium carbonate by weight: minimum 18%
- Particle size: Not less than 90% of the material shall pass through 4 mm IS sieve and be retained on 1 mm IS sieve. Not more than 5% shall be below 1 mm IS sieve
- Packing: Packed in 50 kg (dry) capacity woven polypropylene bags with polyethylene inner lining. 4% empty bags to be supplied at no extra cost
- Each bag to guarantee minimum product weight (net) as specified on the bag
- Marking: FAO logo, product name, active ingredient(s), net and gross weight, Project No., P.O. No. and final destination
SINGLE SUPERSTE (SSP) (Powdered) - Moisture content by weight: maximum 12%
- Free sric acid (as P2O5) by weight:  maximum 4%
- Water soluble ste (as P2O5) by weight: minimum 15.8%
- Sulr (as S) by weight: minimum 11%
- Packing: Packed in 50 kg (dry) capacity woven polypropylene bags with polyethylene inner lining. 4% empty bags to be supplied at no extra cost
- Each bag to guarantee minimum product weight (net) as specified on the bag
- Marking: FAO logo, product name, active ingredient(s), net and gross weight, Project No., P.O. No. and final destination
SINGLE SUPERSTE (SSP) (Granular)NOTE: Price may be slightly higher than powdered material. Quotations may be asked for both types and decision to be taken based on availability and price.
- Moisture content by weight: maximum 5%
- Free sric acid (as P2O5) by weight:  maximum 4%
- Water soluble ste (as P2O5) by weight: minimum 15.8%
- Sulr (as S) by weight: minimum 11%
- Particle size: Not less than 90% of the material shall pass through 4 mm IS sieve and shall be retained on 1 mm IS sieve. Not more than 5% shall be below 1 mm                                       Â
- Packing: Packed in 50 kg (dry) capacity woven polypropylene bags with polyethylene inner lining. 4% empty bags to be supplied at no extra cost
- Each bag to guarantee minimum product weight (net) as specified on the bag
- Marking: FAO logo, product name, active ingredient(s), net and gross weight, Project No., P.O. No. and final destination
TRIPLE SUPERSTE (TSP) - Moisture content by weight: maximum 5%
- Free sric acid (as P2O5) by weight:  maximum 3%
- Total stes (as P2O5) by weight: minimum 46%
- Water soluble ste (as P2O5) by weight: minimum 42.5%
- Particle size: Not less than 90% of the material shall pass through 4 mm IS sieve and shall be retained on 1 mm IS sieve. Not more than 5% shall be below 1 mm                                      Â
- Packing: Packed in 50 kg (dry) capacity woven polypropylene bags with polyethylene inner lining. 4% empty bags to be supplied at no extra cost
- Each bag to guarantee minimum product weight (net) as specified on the bag
- Marking: FAO logo, product name, active ingredient(s), net and gross weight, Project No., P.O. No. and final destination
POTASSIUM CHLORIDE/MURIATE OF POTASH (MOP) (Crystaler) - Moisture content by weight: maximum 0.5%
- Water soluble potash content (as K2O) by weight: minimum 60%
- Sodium (as NaCl) by weight: maximum 3.5%
- Particle size: Not less than 65 % of the material shall pass through 1.7 mm IS sieve and be retained on 0.25 mm IS sieve
- Packing: Packed in 50 kg (dry) capacity woven polypropylene bags with polyethylene inner lining. 4% empty bags to be supplied at no extra cost
- Each bag to guarantee minimum product weight (net) as specified on the bag
- Marking: FAO logo, product name, active ingredient(s), net and gross weight, Project No., P.O. No. and final destination
POTASSIUM CHLORIDE/MURIATE OF POTASH (MOP) (Granular)NOTE: Price may be slightly higher than crystaler material. Quotations may be asked for both types and decision to be taken based on availability and price.
- Moisture content by weight: maximum 0.5%
- Water soluble potash content (as K2O) by weight: minimum 60%
- Sodium (as NaCl) by weight: maximum 3.5%
- Magnesium (as MgCl2) by weight: maximum 1%
- Particle size: Not less than 90% of the material shall pass through 3.35 mm IS sieve and be retained on 1 mm IS sieve. Not more than 5% should be below 1 mm size.
- Packing: Packed in 50 kg (dry) capacity woven polypropylene bags with polyethylene inner lining. 4% empty bags to be supplied at no extra cost
- Each bag to guarantee minimum product weight (net) as specified on the bag
- Marking: FAO logo, product name, active ingredient(s), net and gross weight, Project No., P.O. No. and final destination
POTASSIUM SULTE/SULTE OF POTASH (SOP) - Moisture content by weight: maximum 1.5%
- Potash content (as K2O) by weight: minimum 50%
- Total chlorides (as Cl) by weight: maximum 2.5%
- Sodium (as NaCl) by weight: maximum 2%
- Sulr (as S) by weight: minimum 17.5%
- Particle size: Not less than 65 % of the material shall pass through 1.7 mm IS sieve and be retained on 0.25 mm IS sieve
- Packing: Packed in 50 kg (dry) capacity woven polypropylene bags with  polyethylene inner lining. 4% empty bags to be supplied at no extra cost
- Each bag to guarantee minimum product weight (net) as specified on the bag
- Marking: FAO logo, product name, active ingredient(s), net and gross weight, Project    No., P.O. No. and final destination
DIAMMONIUM STE (DAP) - Moisture content by weight: maximum 1.5%
- Total nitrogen content by weight (on dry basis): minimum 18%
- Neutral ammonium citrate soluble ste (as P2O5) content by weight: minimum 46%
- Water soluble ste (as P2O5) content by weight: minimum 41%
- Particle size: Not less than 90% of the material shall pass through 4 mm IS sieve and be retained on 1 mm IS sieve. Not more than 5% shall be below 1 mm size
- Packing: Packed in 50 kg (dry) capacity woven polypropylene bags with polyethylene inner lining. 4% empty bags to be supplied at no extra cos.
- Each bag to guarantee minimum product weight (net) as specified on the bag
- Marking: FAO logo, product name, active ingredient(s), net and gross weight, Project No., P.O. No. and final destination
NPK COMPLEX 15-15-15 - Moisture content by weight: maximum 1.5%
- Total nitrogen content by weight (on dry basis): minimum 15%
- Neutral ammonium citrate soluble ste (as P2O5) content by weight: minimum 15%
- Water soluble ste (as P2O5) content by weight: minimum 12%Â
- Water soluble potash (as K2O) content by weight: minimum 15%Â
- Particle size: Not less than 90% of the material shall pass through 4 mm IS sieve and be retained on 1 mm IS sieve. Not more than 5% shall be below 1 mm size
- Packing: Packed in 50 kg (dry) capacity woven polypropylene bags with polyethylene inner lining. 4% empty bags to be supplied at no extra cost
- Each bag to guarantee minimum product weight (net) as specified on the bag
- Marking: FAO logo, product name, active ingredient(s), net and gross weight, Project No., P.O. No. and final destination
NPK COMPLEX 17-17-17 - Moisture content by weight: maximum 1.5%
- Total nitrogen content by weight (on dry basis): minimum 17%
- Neutral ammonium citrate soluble ste (as P2O5) content by weight: minimum 17%
- Water soluble ste (as P2O5) content by weight: minimum 13.6%
- Water soluble potash (as K2O) content by weight: minimum 17%
- Particle size: Not less than 90% of the material shall pass through 4 mm IS sieve and be retained on 1 mm IS sieve. Not more than 5% shall be below 1 mm size
- Packing: Packed in 50 kg (dry) capacity woven polypropylene bags with polyethylene inner lining. 4% empty bags to be supplied at no extra cost
- Each bag to guarantee minimum product weight (net) as specified on the bag
- Marking: FAO logo, product name, active ingredient(s), net and gross weight, Project No., P.O. No. and final destination
NPK COMPLEX 19-19-19NOTE:  All other NPK complex grades will follow the same rule, particularly water soluble ste content should be 85% (minimum) of the neutral ammonium  citrate soluble ste content
- Moisture content by weight: maximum 1.5%
- Total nitrogen content by weight (on dry basis): minimum 19%
- Neutral ammonium citrate soluble ste (as P2O5) content by weight: minimum 19%
- Water soluble ste (as P2O5) content by weight: minimum 15.2%
- Water soluble potash (as K2O) content by weight: minimum 19%
- Particle size: Not less than 90% of the material shall pass through 4 mm IS sieve and be retained on 1 mm IS sieve. Not more than 5% shall be below 1 mm size
- Packing: Packed in 50 kg (dry) capacity woven polypropylene bags with polyethylene inner lining. 4% empty bags to be supplied at no extra cost
- Each bag to guarantee minimum product weight (net) as specified on the bag
- Marking: FAO logo, product name, active ingredient(s), net and gross weight, Project No., P.O. No. and final destination
2. Micronutrient FertilizersZINC SULTE - Zinc (as Zn) content by weight: minimum 21%                                            Â
- Sulr (as S) content by weight: minimum 10%                                        Â
- Lead (as Pb) content by weight: maximum 003%                                   Â
- Copper (as Cu) content by weight: maximum 1%                                     Â
- Magnesium (as Mg) content by weight: maximum 5%                            Â
- Cadmium (as Cd) content by weight: maximum 0.0025%                         Â
- Arsenic (as As) content by weight: maximum 0.01%
- Matter insoluble in water by weight: maximum 1%
- not less than 4
- Form: free flowing powder
CHELATED Zn, AS Zn-EDTA - Zinc content (expressed as Zn) by weight in the form of Zn-EDTA complex: minimum 12%     Â
- Lead (as Pb) content by weight: maximum 0.003%                                        Â
- H: 6.0 â 6.5
- Form: free flowing crystaler
MANGANASE SULTE - Manganese (as Mn) content by weight: minimum 30.5%                             Â
- Sulr (as S) content by weight: minimum 17%                                              Â
- Lead (as Pb) content by weight: maximum 0.003%                                          Â
- Copper (as Cu) content by weight: maximum 0.1%                                          Â
- Magnesium (as Mg) content by weight: maximum 2%
- Matter insoluble in water by weight: maximum 1%·   Â
- not less than 3.75Â
- Form: free flowing powder                                                    Â
BORAX (SODIUM TETRABORATE) - Boron (as B) content by weight: minimum 10.5%   Â
- Lead (as Pb) content by weight: maximum 0.003%Â
- Matter insoluble in water by weight: maximum 1%
- 9.0-9.5Form: free flowing powder
COPPER SULTE - Copper (as Cu) content by weight: minimum 24%   Â
- Sulr (as S) content by weight: minimum 12%
- Soluble iron and aluminium compounds (expressed as Fe) content by weight: maximum 0.5%Â
- Lead (as Pb) content by weight: maximum 0.003%
- Matter insoluble in water by weight: maximum 1%
- not less than 3
- Form: free flowing powder/granular                                      Â
FERROUS SULTE - Ferrous iron (as Fe) content by weight: minimum 19%
- Sulr (as S) content by weight: minimum 10.5%
- Free acid (as H2SO4) content by weight: maximum 1%
- Ferric iron (as Fe) content by weight: maximum 0.5%Â
- Lead (as Pb) content by weight: maximum 0.003%
- Matter insoluble in water by weight: maximum 1%
- not less than 3.5
- Form: free flowing powder                                                         Â
CHELATED IRON, AS Fe-EDTA - Iron content (expressed as Fe) by weight in the form of Fe-EDTA complex: minimum 12%     Â
- Lead (as Pb) content by weight: maximum 0.003%                                       Â
- 5.5 â 6.5
- Form: free flowing crystaler
AMMONIUM MOLYBDATE - Molybdenum (as Mo) content by weight: minimum 52%Â
- Lead (as Pb) content by weight: maximum 0.003%
- Matter insoluble in water by weight: maximum 1%
- 5.0-5.5
- Form: free flowing crystaler
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3. Rock ste (RP)/ste Rock (PR), for Direct Application - Total stes (as P2O5) content by weight: between 15-35% depending on source
- Cadmium (as Cd) content by weight: maximum 27 mg/kg of RP
- Particle size: Not less than 90% of the material shall pass through 0.15 mm IS sieve and the balance shall pass through 0.25 mm IS sieve
Global rock ste deposits and their qualityÂ
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4. Organic ManuresQuality of organic manures vary widely, depending on the materials used. However, basic criteria to consider suitability of the material as a nutrient source are:
- Organic matter content by weight: minimum 30%
- Organic carbon content by weight: minimum 12%
- Total nutrients (N+ P2O5+ K2O) content by weight: minimum 5%
Subject to doubt and availability of analytical facilities, contents of following heavy metals should be checked:
- Arsenic (As) content by weight: maximum 10 mg/kg
- Cadmium (Cd) content by weight: maximum 5 mg/kg
- Cromium (Cr) content by weight: maximum 50 mg/kg
- Copper (Cu) content by weight: maximum 300 mg/kg
- Lead (Pb) content by weight: maximum 100 mg/kg
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