In agricultural production, nitrogen is the main factor in crop growth and formation. Liquid nitrogen solutions allow you to provide plants with nutrients as accurately and efficiently as possible during key phases of vegetation.
One such solution is KAS fertiliser, which combines practical application, flexibility of use and stable access to nitrogen in various forms.
UAN is an abbreviation for urea ammonium nitrate, an aqueous solution of urea and ammonium nitrate containing available nitrogen in three forms: nitrate, ammonium and amide. This combination provides both short-term and prolonged plant nutrition, which is important at all stages of development — from tillering to the formation of generative organs.
Main part: benefits, mechanism and how UAN works
Principle of action
UAN fertiliser works through the simultaneous presence of three forms of nitrogen:
- nitrate (NO₃⁻) — quickly available to plants, provides rapid nutrition, which is especially important during periods of intensive growth;
- ammonium (NH₄⁺) — creates a stable source of nitrogen, which is microbiologically transformed into available forms;
- amide (NH₂) — gradually mineralises, ensuring long-term availability of nitrogen in the soil.
This allows the plant to absorb nitrogen over a long period of time without the sharp ‘spikes’ in availability that are characteristic of certain forms of solid nitrogen fertilisers. The stable action of UAN is especially important during critical phases of development: from the resumption of vegetation in spring to tillering and stem elongation.
Types of Dobrosem UAN brands: UAN 32, UAN 28 and UAN 26
Liquid nitrogen solutions are available in various nitrogen concentrations in Eurosem – Dobrosem UAN:
- UAN 32 — contains about 32% total nitrogen, provides maximum concentration of nutrients per unit volume, which is well suited for application in favourable temperatures.
- CAS 28 — with a mass fraction of nitrogen of approximately 28%, is characterised by a lower crystallisation temperature, which is important for working in cold conditions or in early spring.
- CAS 26 — with a mass fraction of nitrogen of approximately 26%, is characterised by an even lower crystallisation temperature. It also contains 4% sulphur.
This allows agronomists to adapt the nitrogen nutrition scheme to climatic conditions and cultivation technologies.
Practical benefits for farmers
For agronomists and farmers, Dobrosem CAS fertiliser is not just a nitrogen solution, but a nutrient management tool:
- flexibility of application — its liquid form allows CAS to be used in tank mixtures with pesticides, microfertilisers or growth regulators, reducing the number of passes and costs;
- uniform nutrition — high solubility and homogeneity of the solution ensure better contact with the root system and leaf surface;
- cost reduction — less nitrogen loss during transportation and application than in granular forms;
Adaptation to conditions — different brands (CAS 32, CAS 28, CAS 26) allow you to choose the optimal formula for specific soil and weather conditions.
This is especially noticeable in arid or unstable weather conditions, where uniform nutrition and timely application determine the final yield.
Climate and conditions of use
The ambient temperature significantly affects the physical properties of UAN. UAN 32 crystallises at around 0 °C, while UAN 28 can withstand lower temperatures down to –17 °C. This is important in spring or autumn when night frosts are possible.
A liquid without free ammonia does not evaporate nitrogen during application, which increases efficiency in cold and wet conditions. At the same time, it is recommended to take the weather forecast into account when planning work to avoid crystallisation in the equipment.
Dobrosem CAS solution for modern farming
CAS is a proven technological solution for effective nitrogen nutrition of crops. Eurosem offers the Dobrosem CAS solution, which integrates a deep agronomic understanding with the practical needs of modern farms.
By choosing Dobrosem CAS fertiliser from Eurosem, you get:
- CAS 32, CAS 28 and CAS 26 brands adapted to your climatic conditions;
- expert support and agronomic recommendations;
- the possibility of integration with other nutrients for complete plant nutrition.