UAN-28, Ukraine

UAN 28 is one of the most effective and popular liquid nitrogen fertilizers on the Ukrainian market, used for comprehensive nutrition of agricultural crops. Thanks to its unique formula, it contains 28% total nitrogen in three different forms: amide, ammonium, and nitrate.

Such a balanced composition provides both rapid and prolonged plant nutrition, which promotes maximum crop potential utilization and stable yield growth.

Formula: (NH4)2S2O3
Country of origin: Ukraine
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Description

Neuron offers UAN 28 with quality assurance from leading global manufacturers, provides support from professional agronomists, and ensures delivery at a convenient time for the client throughout Ukraine.

What are the advantages of UAN 28 from Neuron

The main advantage of UAN 28 lies in its ability to comprehensively meet plant nitrogen needs at different growth stages. The amide form of nitrogen (50%) ensures long-term nutrition — it decomposes slowly, guaranteeing plant feeding throughout the entire growing season.

The ammonium (25%) and nitrate (25%) forms provide rapid nitrogen uptake, which is critical during active growth and the formation of productive organs. This fertilizer is a clear solution with a density of about 1.28 g/cm³ and an alkaline pH of around 8.5, which increases solution stability and safety for plants.

Thanks to its resistance to freezing (down to –18 °C), UAN 28 can be stored and transported even in cold weather without concerns about quality loss. The fertilizer dissolves quickly in water and mixes well with other products, allowing its use in tank mixes with crop protection agents and micronutrients.

Another important advantage is the absence of free ammonia, which makes application safe for plants — eliminating leaf burn, preserving soil structure, and reducing environmental impact. Neuron offers UAN 28 at competitive market prices and provides flexible supply options: from small orders to large batches.

Application of UAN 28 for different crops

UAN 28 is widely used in agriculture both for feeding main cereal crops and for technical, leguminous, vegetable, and fruit crops.

For cereals such as wheat, barley, and rye, the fertilizer is applied at early tillering and stem elongation stages, promoting the development of a strong root system and leaf apparatus. Active nitrogen supply during these phases increases both the quantity and quality of grain and improves its protein composition.

For corn, UAN 28 is recommended at the stages of active stem and leaf growth as well as during kernel formation, positively affecting yield and product quality.

For sunflower and rapeseed, the fertilizer is used during head formation and opening, while in legumes it supports nitrogen balance and stimulates nitrogen fixation.

In vegetable farming, UAN 28 is applied to root and leafy crops, increasing yields, improving taste qualities, and extending storage life.

The fertilizer is also suitable for fruit and berry plantations, providing nutrition during periods of active shoot growth and fruiting.

Foliar application of UAN 28 allows quick compensation for nitrogen deficiency during unfavorable weather conditions, enhances plant resistance to stress, and increases productivity.

Environmental safety of UAN 28

Environmental safety is a key factor determining the suitability of UAN 28 for modern agriculture.

The main challenge with nitrogen fertilizers is high nutrient losses and negative environmental impact. According to FAO data, nitrogen losses from traditional dry fertilizers can reach 30–50% due to ammonia volatilization, nitrate leaching into groundwater, and denitrification, leading to water pollution and greenhouse gas (N2O) emissions.

With UAN 28 it is different:

  1. Thanks to its unique formula (50% amide nitrogen, 25% ammonium, and 25% nitrate), it significantly reduces nitrogen losses.
  2. The amide form does not volatilize and decomposes gradually in the soil, ensuring long-term plant nutrition.
  3. Studies show that the use of UAN 28 reduces ammonia volatilization by 25–40% compared to ammonium nitrate application, lowering environmental impact and saving fertilizer.
  4. The absence of free ammonia makes UAN 28 application safe for plants, reducing the risk of leaf and root burns often seen with ammonia-based fertilizers.
  5. Additionally, UAN 28 has a low denitrification potential, meaning reduced emissions of N2O greenhouse gas, which is 298 times more potent than CO2. Lowering N2O emissions helps fight global warming and protect the climate.
  6. According to Ukrainian agricultural laboratories, when applied within recommended rates, UAN 28 does not cause significant changes in soil acidity (pH remains within 6.5–7.5), maintaining optimal conditions for soil microorganisms and biological processes essential for fertility.

Neuron controls logistics and storage conditions of the fertilizer, ensuring quality stability: transportation and storage temperature is strictly maintained from -18 to +30 °C, with protection from direct sunlight and other necessary measures. This prevents decomposition and nutrient loss.

Thus, UAN 28 combines high nutritional efficiency with minimal environmental impact, making it an optimal choice for farmers aiming to combine productivity with environmental responsibility.

Advantages of cooperation with Neuron

We have over 20 years of experience in the fertilizer market and maintain strong partnerships with leading manufacturers in Ukraine and worldwide, including Ostchem, Agropolychim, Neochim, Socar, and others.

Our customers also highlight the following cooperation advantages:

  1. Well-established logistics system ensures fast delivery to any region of the country — by road, rail, or sea transport.
  2. Company specialists provide professional consultations on fertilizer selection, crop nutrition systems, and development of individual application programs.
  3. Neuron guarantees product quality, timely delivery, and flexible cooperation terms — from 1 kg to railcar loads.
  4. Partnership with Neuron allows optimizing crop nutrition costs and increasing agricultural efficiency.

How to choose the right UAN 28 fertilizer

The correct choice of rate and timing for UAN 28 application depends on crop type, growth stage, agronomic conditions, and soil characteristics.

Recommended application rates:

  1. Pre-sowing application: 20–40 l/ha to stimulate seedling growth and improve early development.
  2. Top-dressing during vegetation: 30–60 l/ha to ensure steady growth and productive organ formation.
  3. Foliar application: 10–15 l/ha (diluted) for quick correction of nutrition in case of nitrogen deficiency.

Before mixing with other products, a compatibility test should be performed. If needed, Neuron provides agronomic support and recommendations, helping increase fertilizer efficiency and avoid application errors.

  • Features
  • Ingredients
  • Benefits
  • Application
  • High nutrient concentration. Contains 28% nitrogen in an easily accessible liquid form, allowing the plant to receive a significant amount of nitrogen with a relatively small volume of fertilizer.
  • Liquid form and versatility. The fertilizer is easily applied using standard sprayers or applicators, and is evenly distributed across the soil or leaf surface. UAN-28 is compatible in tank mixtures with other agrochemicals (micronutrient fertilizers, plant protection products) for comprehensive treatment.
  • Resistance to low temperatures. Unlike more concentrated brands, UAN-28 does not crystallize down to -18°C, making it easier to store during winter and apply in early spring under cold conditions.
  • Three forms of nitrogen in the composition. UAN-28 contains nitrate, ammonium, and amide forms of nitrogen, ensuring both quick feeding and long-lasting fertilizer action.
  • Physical properties: Transparent or lightly colored solution with a density of about 1.28 g/cm³, slightly alkaline reaction (pH ~8.5).
  • Manufacturer: Ukraine
  • Prolonged action. Thanks to the three forms of nitrogen, the fertilizer gradually releases the nutrient, providing continuous feeding for crops and increasing the efficiency of nitrogen use by plants.
  • Minimal nitrogen loss. UAN-28 almost does not lose nitrogen in the form of ammonia (there is no free ammonia in the composition), and the total losses during application are significantly lower than those of granular fertilizers (not exceeding 10%). Nitrogen is not quickly leached or evaporated, so plants benefit maximally from the applied fertilizer.
  • High efficiency and uniform application. The liquid form ensures even coverage of the soil or leaf surface, improving nutrient absorption by both the root system and leaves. Compared to solid forms, liquid UAN-28 is more accurately distributed, increasing fertilizer efficiency and the effectiveness of feeding.
  • Safety for plants and soil. UAN-28 does not create high local salt concentrations and does not draw moisture from the soil when dissolved, unlike urea granules. This means there is no competition between the fertilizer and plants for soil moisture, minimizing the risk of crop damage.

UAN-28 Ostchem is suitable for feeding all major agricultural crops. It is successfully used on cereal grains (wheat, barley, rye), corn grains, oilseeds (rapeseed, sunflower, soybeans), industrial crops (sugar beet, potatoes), and other crops, as well as in horticulture.

The fertilizer can be applied in the fall (before main soil cultivation) or in the spring before sowing (pre-sowing cultivation) to provide an initial nitrogen reserve. The most common application is early spring feeding of winter crops on frozen soil when the snow melts and vegetation is restored. During the growing season, UAN-28 is used for root and foliar feeding of both spring and winter crops during critical growth phases (such as tillering in cereals, stem elongation, cob formation in corn, etc.). Application can be done either once or in multiple small doses, depending on the crop’s needs and the agronomic scheme.

Can UAN 28 cause plant burns?

No, provided that the recommended application rates and proper dilution are followed.

Can UAN 28 be mixed with other fertilizers or pesticides?

Yes, UAN 28 is compatible with most products, but a compatibility test is recommended before mixing.

What is the average price of UAN 28 and what does it depend on?

The price depends on the order volume, delivery conditions, and the current market. Neuron offers competitive prices and favorable cooperation terms.

Can UAN 28 be used for foliar feeding?

Yes, the fertilizer is effective and safe for foliar application when dilution guidelines are followed.

How should UAN 28 be stored?

Store in a dry place, protected from direct sunlight, at temperatures between –18 and +30 °C.

Does UAN 28 affect soil acidity?

When applied at recommended rates, it does not cause significant changes in soil pH.

What is the shelf life of UAN 28?

When stored properly, the shelf life is several months without loss of properties.

Is UAN 28 suitable for drip irrigation systems?

Yes, the fertilizer is compatible with such systems and allows precise nitrogen dosing.

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