Urekal® K: Revolutionary Controlled-Release Potassium Fertilizer from MOP

Urekal® K is a groundbreaking controlled-release MOP (Muriate of Potassium) fertilizer from Planet Bioscience, revolutionizing potassium delivery in agriculture. As the world’s first-in-class product, it gradually releases potassium chloride (KCl) nutrients to the soil, maximizing efficiency and minimizing loss. Powered by proprietary 5G Coated Technologies, Urekal® K ensures reliable nutrient release from irregularly shaped MOP particles, making it affordable, innovative, and accessible worldwide.

Our in-house produced soil-biodegradable and compostable polymer coating enhances environmental sustainability while delivering 57-58% K₂O content. Available in release variants from 60 to 300 days, Urekal® K is perfect for high-potassium-demand crops like oil palms, bananas, potatoes, sugarcane, and more. Choose irregular-shaped particles for cost-effective massive affordability or shiny spherical particles for premium appearance.

By controlling the release of potassium from MOP, Urekal® K addresses key challenges in modern farming: nutrient leaching, over-fertilization, and environmental impact. Experience the future of potassium fertilization – sustainable, efficient, and yield-boosting.

Mechanism of Action (MOA)

Urekal® K utilizes a advanced biodegradable and compostable polymer coating to regulate KCl release over 60-300 days. This controlled-release mechanism ensures:

  • Steady Potassium Supply: Nutrients are delivered gradually to the plant rhizosphere, matching crop demand.
  • Reduced Nutrient Loss: Minimizes leaching by up to 40%, keeping more potassium in the soil where it’s needed.
  • Higher Absorption Efficiency: Enhances root uptake for optimal plant health and vigor.


Unlike traditional MOP fertilizers that release KCl rapidly, Urekal® K’s innovative coating technology – a world-first for irregular MOP particles – provides consistent, long-term nourishment. This makes it a game-changer in controlled-release potassium fertilizers.

Key Benefits of Urekal® K

Urekal® K, the pioneering controlled-release potassium from MOP, offers unmatched value for farmers, agronomists, and the environment. Here’s why it’s a world groundbreaking K fertilizer:

  1. Enhanced Nutrient Efficiency
    Slow, controlled KCl release maximizes plant uptake, aligning with gradual crop needs. Reduce leaching losses by up to 40% and cut KCl dosage by 20-40% while maintaining or increasing yields. Ideal for sustainable potassium management.

  2. Improved Crop Growth and Yield
    Supports diverse physiological processes across growth stages, resulting in stronger plants, better vigor, and higher productivity. Nutrients are more readily absorbed by roots, boosting overall crop performance – especially for potassium-hungry crops like oil palms, bananas, potatoes, and sugarcane.

  3. Multiple Release Rates for All Crops
    Tailored variants available: 60, 90, 120, 150, 180, 270, and 300 days. Customize for short-season crops (e.g., rice, vegetables) or perennials (e.g., oil palm, coffee). Urekal® K excels in high-potassium applications, making it versatile for global agriculture.

  4. Eco-Friendly and Cost-Effective
    The biodegradable coating decomposes naturally, promoting soil health without harmful residues. Lower application frequency reduces labor costs, fuel usage, and overall expenses – a win for sustainable farming practices.

  5. Versatile Packaging Options
    Available in 25 kg, 50 kg, 100 kg, and 500 kg bags to suit smallholder farms or large-scale operations.

Field tests conducted by Bogor Agricultural Institute (IPB) on oil palm seedlings confirm Urekal® K’s effectiveness. Doses from 50% to 150% produced growth at least as good as standard fertilizers, with Relative Agronomic Effectiveness (RAE) above 112%. The recommended 75% dose optimizes results for main nursery phases.

Product Types and Content

Product VariantKCl Release Rate (Days)*Suitable Crop PlantsK₂O Content (%)
Urekal® 9090Rice, Corn, Soybean, Tomato, Chili, Potato, Cabbage, Carrot, Onion, Watermelon, Melon58%
Urekal® 120120Pineapple, Mango, Orange57%
Urekal® 180180Oil Palm, Cocoa, Coffee, Sugarcane57%
Urekal® 270270Perennials requiring extended release57%
Urekal® 300300Long-cycle high-potassium crops57%

*Note: Release rate measured in a constant 25°C water bath when above 75% of KCl is cumulatively released.

Other Controlled-Release Options

Expand your potassium solutions with Urekal® variants:

  • Controlled-release potassium sulfate (K₂SO₄)




  • Controlled-release potassium nitrate (KNO₃)

Frequently Asked Questions

Traditional MOP releases KCl rapidly, causing high leaching and waste. Urekal® K offers controlled, consistent release for superior efficiency, reduced potassium loss, and better crop uptake – a true innovation in controlled-release potassium from MOP.
Yes, our soil-biodegradable, compostable polymer decomposes naturally, leaving no harmful residues and supporting eco-friendly agriculture.

Base your selection on crop type, growth cycle, soil conditions, and climate:

  • 90-120 days for short-season crops (e.g., rice, vegetables).
  • 150-180+ days for perennials (e.g., oil palm, coffee).
    Consult agronomists for tailored application scenarios.

Absolutely. By providing even potassium availability, it enhances nutrient uptake, plant strength, and yield potential – proven in field tests on oil palms.

Yes, including potassium sulfate (K₂SO₄) and potassium nitrate (KNO₃) for specialized needs.

Coating irregularly shaped, low-cost MOP particles is extremely challenging. Too thick a coating blocks release; too thin offers no control. Our nuanced 5G technologies overcome this, distancing us from even giant fertilizer companies – making Urekal® K a world groundbreaking K fertilizer.

Ready to revolutionize your potassium fertilization? Contact Planet Bioscience at planetbioscience.com/contact or visit our address: #02-108 Tradehub 21, 18 Boon Lay Way, Singapore 609966. Unlock the power of controlled-release potassium from MOP today!