MUMBAI, India, April 17 -- Intellectual Property India has published a patent application (202641042462 A) filed by Sr University, Warangal, Telangana, on April 2, for 'encapsulated mineral-based fertilizer composition for controlled nutrient delivery in soil.'

Inventor(s) include Chebrolu Sravani; and Murugesan Mohana Keerthi.

The application for the patent was published on April 17, under issue no. 16/2026.

According to the abstract released by the Intellectual Property India: "Disclosed herein is a fertilizer granule composition (100) for controlled and sustained release of nitrogen nutrients in soil environments, the composition (100) comprising a core layer (102) formed from a microporous aluminosilicate material (112) configured to adsorb and retain ammonium-based nitrogen ions through ion-exchange interactions, a shell (104) encapsulating the core (102), a biodegradable hydrophilic polymer matrix (106) forming the shell and configured to absorb soil moisture, swell, and regulate diffusion of nitrogen nutrients from the core (102), sodium alginate (108) and chitosan (110) forming a crosslinked biopolymer network to enhance structural stability and enable moisture-triggered nutrient release, wherein the microporous core facilitates efficient nutrient loading while the encapsulating shell controls permeability and gradual nutrient release, thereby reducing nitrogen leaching losses, improving nitrogen use efficiency, and enabling environmentally sustainable nutrient delivery in agricultural soil systems."

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