Description

• A special category of slow release fertilizer.
• Water insoluble but plant available (citrate and DTPA soluble).
• Environment friendly and effective alternatives to water soluble materials. 
• Contain 100% plant food. 
• Fertilizers of zinc, copper, iron, manganese, boron and molybdenum developed. Can be used as single nutrient or multinutrient sources.

Chemical and physical nature

• Inorganic polymeric compounds
• Crystalline
• Water solubility <10%
• 0.33M Citrate and DTPA solubility >90%
• Non-hygroscopic and powdery

Advantages 

Significant improvement in yield and quality of crops
Lower dosages required 
Highly cost-effective
Higher use-efficiency
Non-polluting                                         
Negligible leaching losses
Easy application by broadcasting
Storehouse of continuous nutrient source throughout crop growth period

Suitability  

Can be used in all soils that are deficient in any one of the micronutrients and in soils that show responses to micronutrient application. Useful for cereals, vegetables, fruits, flowers, etc.

Test information

Over 30% increase in rice, wheat and maize
25% increase in gram      
25% increase in cabbage and radish
100% increase in chillies                               
50% increase in spinach                              
Significantly higher nutrient levels in crop     
Significant increase in vitamin C content

Dosages at which responses have been observed

   Zn : 1 kg/ha                   Mn :     1 kg/ha      
   Cu : 1 kg/ha                 B   :  0.5  kg/ha
    Fe :  2 kg/ha                Mo : 0.04 kg/ha

Publications

1.S,.Bandyopadhyay, Ghosh K and Varadachari C. (2014) Multimicronutrient Slow-Release Fertilizer of Zinc, Iron, Manganese, and Copper. International Journal of Chemical EngineeringVolume 2014 

2. Bandyopadhyay S, Bhattacharya I, Ghosh K and Varadachari C  (2008) New Slow-releasing molybdenum fertilizer. Journal of Agricultural & Food Chemistry [American Chemical Society]  (USA) 56 1343-1349.

3. Bhattacharya I, Bandyopadhyay, S, Varadachari C  and  Ghosh K (2007) Development of a novel slow-releasing iron-manganese fertilizer compound,  Industrial & Engineering Chemistry Research [American Chemical Society] (USA) 46 2870-2876.

4. Development of a Novel Slow-Releasing Iron-Manganese Fertilizer Compound. I. Bhattacharya, S.Bandyopadhyay, C Varadachari  and  K. Ghosh : Industrial & Engineering Chemistry Research : 46 : 2870-2676

5. Novel slow-releasing micronutrient fertilizers. I. Zinc compounds : S.K. Ray, C.Varadachari & K. Ghosh :Industrial & Engineering Chemistry Research [American Chemical Society] (USA) 32 : 1218-1227 (1993).

6. Novel  slow-releasing  micronutrient  fertilizers 2. Copper Compounds:   S.K. Ray, C. Varadachari & K. Ghosh : Journal of Agricultural & Food Chemistry [American Chemical Society] (USA)  45 : 1447-1453 (1997).

7. Removing   micronutrient   metal   cation  interferences  prior  to  titrimetric determination  of  polyphosphate  chain  length’  :  S.K.  Ray,  P.K. Chandra, C. Varadachari & K. Ghosh :Journal of Agricultural & Food Chemistry [American Chemical Society] (USA)  46 : 2222-2226 (1998).

8. Polyphosphates : The future of fertilizer development : C. Varadachari, S.K.  Ray & K. Ghosh :  Everyman’s Science 28 : 64-66 (1993).

6. Phosphoric acids, phosphates and fertilizers for the future : C. Varadachari :  Indian National Science Academy Proceedings (Part B)  58 : 119-126  (1992).

7. Phosphoric  acid  polymerisation  and  its  role  in  fertilizer development : C.Varadachari : ‘Indian Fertilizer Scene Annual - 1992’, Commercial Publications, Bombay, 125-126 pp.  (1992).

8. Novel slow-releasing  micronutrient  fertilizers : C.  Varadachari  : Fertilizer News 37(3) : 49-53 (1992).