Also, it will directly affects economics of crop by reducing fertilizer dose
Dear Vinayak,
Sand and granular limestone are popular fillers because they are inexpensive and make distribution of the fertilizer easier without adversely affecting your crops.Coarse silica sand, tightly graded with a mineral oil dust suppressant that is used as a filler material when manufacturing bagged fertilizer.
Time-Release Ingredients
Nutrients in slow- or time-release fertilizers can be coated with active or inactive ingredients to gradually release these nutrients into the soil. nonconventional soil additives are often added to fertilizer materials to control the release of these nutrients through a chemical response. Another process called multicasting uses multiple layers of a low-cost fatty acid – an inactive ingredient. The granules are then sealed in paraffin – a waxy substance. The macro-nutrients are gradually released into the soil provided the soil is warm and the moisture level high enough to allow erosion of the coating.
Following Coating can be used
1. Neem Coated Urea.
2. Sulphur coated Urea.
3. Zinc coated Urea.
4. Polymer coated Urea.
Regards,
Prem Baboo
Article SULPHUR COATED UREA
Article NEEM COATED UREA AN ECO-FRIENDLY APPROACHES
Article NEEM OIL & NEEM COATED UREA
Dear Vinayak,
to follow up on Prem's answer, I imagine if you reduce the filler the result could be uneven distribution at spreading and potentially quicker nutrient release. However, quicker nutrient release is not necessarily better as there is a risk of not matching demand with supply (amount of nutrients exceeding crop demand) which can lead to losses to the environment + it is an economic loss. Therefore a lot fertilizer companies develop slow release product i.e. through coating, to ensure longer, more stable release of nutrients to meet demans from growing plant.
Let me take the whole discussion further . how do you feel the type of filler material in eventual quality of fertilizer when used as foliar spray ? And secondly , does it not interfere with uptake efficiency of applied nutrients ?. If not so , how is it so effective with regard to unit cost of applied nutrient ?
I have no experience with foliar sprays as they wouldn't be commonly used in Ireland, where I work. If anything, specialty fertilisers would be used as foliar sprays in some circumstances, but not as a routine management operation. I can't find any information what filler, if any, they use, since they use water for distribution.
Agreed with Anoop Sir... We have to increase efficiency and reduce economy of fertilizers... I think, reduction in filler material from fertilizers is one of the option for that.
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