MUMBAI, India, Aug. 10 -- Intellectual Property India has published a patent application (202621071711 A) filed by Dr. Sumit Biswas; Pragya Singh Deo; Dr. Shubhangi Pramod Deokar; Dr. Vimal Kumar; Saumya Mishra; Dr. Sandeep Kumar; V. Saravanan; Dr. J. Mohamed Jassim; Dr. Songthat William Haokip; and Dr. Gurbir Singh on June 09, 2026, for A Controlled Release Macro–micro Nutrient Complex Bio-Fertilizer Tablet Tailored For Ultra-High-Density Guava Orchards.
Inventors include Dr. Sumit Biswas; Pragya Singh Deo; Dr. Shubhangi Pramod Deokar; Dr. Vimal Kumar; Saumya Mishra; Dr. Sandeep Kumar; V. Saravanan; Dr. J. Mohamed Jassim; Dr. Songthat William Haokip; and Dr. Gurbir Singh.
The application for the patent was published on July 31, 2026, under issue no. 31/2026.
Abstract: [05] Ultra-high-density planting systems in guava (Psidium guajava L.) improve land-use efficiency and early productivity, but they also intensify competition for nutrients, water, and rhizosphere space. Conventional fertilizer application in such systems often suffers from nutrient leaching, uneven root-zone distribution, repeated labour requirement, and poor synchronization between nutrient supply and crop demand. This paper proposes a controlled-release macro–micro nutrient complex bio- fertilizer tablet specifically designed for ultra-high-density guava orchards. The tablet integrates major nutrients, secondary nutrients, essential micronutrients, microbial inoculants, organic biostimulants, and biodegradable release-modifying carriers into a compact root-zone delivery system. The proposed tablet is intended to release nutrients gradually under drip-irrigated orchard conditions while supporting beneficial microbial colonization around the active feeder-root zone. The formulation includes nitrogen, phosphorus, potassium, calcium, magnesium, sulphur, zinc, boron, iron, manganese, copper, molybdenum, Azotobacter, phosphate-solubilizing bacteria, potassium-solubilizing bacteria, zinc-solubilizing bacteria, humic substances, and seaweed-derived biostimulant. A multilayer tablet architecture is proposed, consisting of an outer biodegradable coating, an intermediate mineral nutrient matrix, and an inner microbial-protective core. A validation framework is presented for tablet hardness, disintegration, nutrient-release kinetics, microbial viability, soil nutrient availability, leaf nutrient status, vegetative growth, flowering, fruit retention, yield, quality, and soil biological activity. [06] Accompanied Drawing [FIG. 1] [FIG. 2] [FIG. 3] [FIG. 4] [FIG. 5]
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