What if your fertilizer did more than feed your crop? Fusamel Paste is a complete NPK solution engineered to deliver nutrients more efficiently, safely, and more consistently than conventional alternatives.

What Is Fusamel Paste?

Fusamel Paste is a premium line of high-tech NPK paste fertilizers developed by AgriSciences Biologicals and powered by ReaTech® Technology. It is a 100% water-soluble formulation designed for use in furrow, fertigation, drip irrigation, and foliar application across a wide range of crops - from protected vegetables and open-field cereals to woody perennials such as olives, citrus, vines, and fruit trees.

What sets Fusamel apart from the start is what it contains - and how those components work together. Rather than delivering a single nutrient in isolation, each Fusamel formulation provides a complete and balanced nutritional package: Nitrogen in four distinct chemical forms, Phosphorus, Potassium, Sulfur, and a suite of micronutrients including Iron, Zinc, Manganese, and Magnesium. Everything the crop needs, in a single product, precisely formulated and immediately available.

"Complete nutrition. Immediate solubility. Maximum efficiency. Powered by ReaTech® Technology."

ReaTech® Technology: Precision at Every Step

The performance of Fusamel Paste starts in the manufacturing process. ReaTech® Technology is an advanced process control system that governs every aspect of Fusamel's production, from raw material handling to final formulation. Its key characteristics are precise temperature control (±0.1°C), a controlled environment that eliminates contamination risk, viscosity management for stable lump-free pastes, and batch-by-batch reproducibility through accurate, replicable recipes.

The practical result of this manufacturing precision is guaranteed formation of stable chemical complexes (eg. NPC are permanently bound), the molecular structures that give Fusamel its superior solubility and bioavailability. In simpler terms: what is on the label is what reaches the plant, every time, in every batch. For farmers and agronomists who need consistent and predictable results across an entire season, this reliability is not a technical detail - it is a fundamental agronomic advantage.

Four Forms of Nitrogen: From Fast Response to Constant Feeding

Nitrogen is the most nutrient crops demand - and the one most easily wasted. Conventional fertilizers typically deliver nitrogen in a single chemical form, creating a pulse of availability that rarely matches the crop's actual demand curve over the season. Fusamel solves this by incorporating Nitrogen in four simultaneous forms, each with a different release timing and agronomic function.

Nitrate nitrogen immediately. Absorbed directly by roots and leaves without soil conversion, nitrate triggers a rapid plant response: fast energy supply, quick greening, and immediate resumption of growth. It is the form responsible for Fusamel's speed of action, particularly valuable at the start of the season or following stress events.

Ammonium nitrogen - short term. Retained in the soil by cation exchange, ammonium is less susceptible to leaching than nitrate and supports early vegetative development and root establishment over a short-to-medium timeframe. It is particularly valuable on light soil or in wet early-season conditions.

Ureic nitrogen - sustained. Converted progressively to ammonium in the soil, ureic nitrogen bridges the gap between the initial fast-acting pulse and the longer-term organic fraction. Fusamel's low-pH formulation significantly reduces ammonia volatilization during this conversion - one of the primary loss pathways in conventional urea-based products.

Organic nitrogen - long lasting. The slowest-release fraction provides extended nitrogen availability that supports the crop across longer periods without additional applications. It is also the source of Fusamel's embodied organic carbon - a structural component with its own agronomic role, explored in the next section.

Together, these four forms create a continuous feeding profile, from the first application through to the final stages of the crop cycle, that matches the plant's natural demand pattern far more closely than any single-form product can achieve.

Sulfur: The Efficiency Activator That Most Fertilizers Ignore

Every Fusamel formulation contains Sulfur, and this is a deliberate agronomic decision, not a byproduct of the formulation chemistry. Sulfur is the nutrient that determines how efficiently a plant converts absorbed nitrogen into proteins, enzymes, and chlorophyll. Without adequate sulfur, even a well-nourished crop will underperform, because the nitrogen it absorbs cannot be fully metabolized.

This matters more today than it did a generation ago. Modern European soil is increasingly sulfur-deficient, a consequence of the dramatic reduction in atmospheric sulfur deposition following decades of emission controls. Fields that once received a passive sulfur supply through rainfall now require active replenishment. Fusamel addresses this need directly, ensuring that every nitrogen application is accompanied by the sulfur needed to make it work. Sulfur content ranges from 7.89% in Fusamel 8-38-0 to 26.5% in Fusamel 6-6-25, tailored to the nutritional balance of each formulation.  

Embodied Organic Carbon: More Than a Nutrient Carrier

Fusamel contains between 1.5% and 11% organic Carbon depending on the formulation. This Carbon is not added as a cosmetic ingredient or a marketing claim, it is derived from organic nitrogen and fermentation compounds and is structurally integrated into the chemistry of the product itself. This is what AgriSciences Biologicals calls 'embodied carbon', and it plays four distinct agronomic roles.

Improved nitrogen efficiency: organic Carbon helps the plant assimilate nitrogen more effectively through metabolic pathways, meaning more of the applied nitrogen is converted into plant biomass.

Stress buffering: Carbon compounds mitigate osmotic and salt stress at the root zone, particularly valuable at the beginning of the season when young roots are most sensitive.

Enhanced foliar absorption: in foliar applications, embodied carbon improves cuticle penetration and compatibility, increasing the proportion of nutrients that enter the leaf tissue.

Faster plant metabolism: Carbon acts as an energy source that accelerates nutrient conversion within the plant, supporting faster growth responses after application.

This is the key distinction between Fusamel and products that simply add humic acids or sugars to a standard NPK formulation. In those products, carbon is a blended additive with variable and often untested activity. In Fusamel, it is an active and integral part of how the nutrients work.

Superior Solubility and Crop Safety

All six Fusamel formulations are 100% water soluble, with solubility ranging from 400 g/L (Fusamel 9-12-29) to 900 g/L (Fusamel 8-38-0) at 20°C, and maintaining excellent solubility even at 10°C. This means reliable, complete dissolution in irrigation water without risk of dripper or nozzle clogging, even in cold early-season conditions.

Fusamel's acidic pH in solutions ranging from 1.46 to 2.83 depending on product and concentration, provides two additional agronomic benefits. First, it improves the availability of micronutrients such as iron, zinc, and manganese, which become less available in neutral or alkaline soil conditions. Second, it slightly acidifies the irrigation solution, which is beneficial in high-pH water systems common across Mediterranean and Eastern European growing regions.

The very low salt index of Fusamel formulations also makes the product genuinely safe for direct root-zone contact in fertigation and for foliar application during active crop growth, minimizing any risk of osmotic damage or leaf sensitivity even at commercially relevant doses.

What Fusamel Delivers in the Field

Fusamel's agronomic claims are supported by field evidence. In a 2025 olive tree trial conducted by AgriSciences Biologicals, foliar application of Fusamel 13-13-13 produced striking results compared to an untreated control: a +1,060% increase in total leaf nitrogen, +71% increase in leaf phosphorus, +123% increase in leaf iron, and a +13% improvement in Brix, a direct indicator of enhanced plant metabolism, leading to increased sugar content and improved brix.

These figures confirm what the chemistry predicts: Fusamel delivers nutrients rapidly and completely into plant tissue, with measurable and agronomically significant effects on both nutritional status and crop quality.

Conclusion: Fertilization Engineered for Results

Fusamel Paste is not a reformulation of a standard NPK product. It is a complete rethinking of how paste fertilization can work — combining four nitrogen forms for continuous feeding, sulfur for nitrogen efficiency, embodied organic carbon for enhanced absorption and plant metabolism, and the manufacturing precision of ReaTech® Technology to guarantee that every batch performs exactly as formulated.

Whether you are managing protected vegetables, open-field cereals, or high-value woody perennials, Fusamel offers a single, versatile, and scientifically grounded tool to raise the performance of your crop nutrition program.