UAN 26+4S

UAN 26+4S is a concentrated liquid nitrogen fertilizer containing 24–26% total nitrogen in three forms: ammonium (NH₄⁺) — moderately retained in soil, provides stable nutrition; nitrate (NO₃⁻) — readily available but susceptible to leaching; amide (NH₂) — gradually mineralized, offering prolonged action. Additionally, it contains 4% sulfur in the sulfate form (SO₃), which is critical for:

• amino acid and protein synthesis;
• activation of nitrogen metabolism;
• enhanced nitrogen uptake efficiency.

The fertilizer is fully water-soluble, contains no mechanical impurities, and has a neutral to slightly alkaline pH (~7). It is suitable for a wide range of soil types, including acidic, sandy loam, and grey podzolic soils.

Recommended use:

• base application — before sowing with incorporation into soil;
• pre-sowing application — can be mixed with other fertilizers;
• top dressing during vegetation — for cereals, corn, rapeseed, and industrial crops;
• foliar application — in diluted concentrations (7–12%);
• fertigation — especially effective in intensive vegetable cultivation.

Limitations and warnings:

• avoid application during hot weather or high solar activity;
• do not apply to wet foliage without dilution;
• crystallization temperature –14…–17 °C;

Appearance and color: Light yellow liquid with a characteristic odor of its components.

• store in airtight, sealed containers such as IBC tanks, corrosion-resistant reservoirs, or tanker trucks;
• storage area must be protected from direct sunlight, precipitation, and temperature extremes;
• optimal storage temperature: +5 °C to +25 °C;
• Crystallization temperature: –14 °C;
• prevent contamination with foreign matter (soil, crop protection products, pesticides, water);
• do not discharge into sewers or water bodies — disposal must comply with current environmental regulations.

Not recommended: do not store below 0 °C or in contact with unprotected carbon steel — risk of crystallization or stratification due to sulfate content.

Guaranteed shelf life: when stored and transported under proper conditions, the product remains usable for 6 months from the production date. After the expiration of the guaranteed storage period, the fertilizer must be tested for compliance with technical requirements before use.

Note: apply UAN at an air temperature not exceeding +15...+18 C. Apply after sunset (during the daytime, drops of the solution can create a lens effect, burning leaf tissue). Do not apply during rain and dew. Work with a large drop so as not to cause leaf burns