Ammonium nitrate

Ammonium nitrate (NH₄NO₃) – ammonium nitrate is one of the most widely used nitrogen fertilizers, containing 34.4% total nitrogen in two forms:

• nitrate (NO₃⁻) — rapidly absorbed by plants immediately after application;
• ammonium (NH₄⁺) — retained in the soil, providing a prolonged release effect.

This combination delivers both a quick boost for rapid growth and sustained nutrition over several weeks.

Due to its high solubility, ammonium nitrate remains effective even under moderate moisture and is suitable for all soil types. It can be used as a base fertilizer, pre-sowing treatment, top dressing during vegetation, or in fertigation systems after dilution.

Recommended use:

• for all agricultural crops: cereals, industrial crops, vegetables, and forage crops;
• for base application, pre-sowing, top dressing, and fertigation;
• especially effective on crops that require a high initial dose of nitrogen with prolonged action.

Advantages:

• fast-acting and long-lasting nitrogen availability;
• suitable for spring start-up, intensive in-season feeding, and fertigation;
• highly soluble — can be used in liquid form;
• high nitrogen concentration — lower application rates, higher efficiency;
• versatile — compatible with all modern plant nutrition systems.

Limitations and warnings:

• do not apply to dry soil without moisture — risk of partial nitrification “burn”;
• do not mix with crop protection products (CPPs) without compatibility testing;
• avoid storing near heat sources, open flames, or flammable materials;
• potentially explosive under overheating or contamination — follow all storage regulations carefully.

Appearance and color: crystalline powder or granules of white color with a yellowish tint without mechanical mixtures

• Store in dry, well-ventilated rooms, protected from direct sunlight, at a relative air humidity of no more than 70%, on pallets no lower than 15 cm from the floor, in a single row;
• Packaging (bags, big bags) must be hermetically sealed — do not allow moisture penetration;
• Permissible storage temperature: from −20°C to +35°C (do not expose to high humidity; caking and condensation may occur — loosen before use);
• Do not allow contact with acids, alkaline substances, organic compounds, or other fertilizers with which a chemical reaction is possible;
• In case of long-term storage — loosen periodically;
• Do not store near flammable materials, acids, alkalis, oils, or organic fertilizers (the distance to heat sources or open flame must be at least 5 meters);

Storage shelf life: the fertilizer’s shelf life, subject to transportation and storage rules, is 12 months from the date of manufacture. After the shelf life expires, the fertilizer must be checked for compliance with technical specifications before use. Ammonium nitrate is an explosion-hazardous product under certain conditions, so storage rules must be strictly followed and contact with ignition sources must be avoided.

These fertilizer application rates were developed by the Department of Agrochemistry and Soil Science of Uman National University of Horticulture under the scientific supervision of Doctor of Agricultural Sciences, Professor H.M. Hospodarenko, commissioned by AC GROSSDORF, and are the intellectual property of AC GROSSDORF; they may be distributed only with reference to the owner. The application rates provided are general and do not eliminate the need for agronomist consultation.