Volatilisation can affect all fertilizers containing a significant proportion of urea and ammonia nitrogen. Urea and urea ammonium nitrate solution (UAN) are highly sensitive to ammonia volatilisation. The nitrogen that escapes into the air is lost and not available for plant nutrition!
This means that nitrogen fertilizers containing nitrate such as those from Borealis L.A.T are more effective!
Ammonia volatilisation adversely affects the environment and the efficiency of the fertilizers used. It is therefore important to select the right form of nitrogen.
The right form of nitrogen matters:
Reducing ammonia emissions protects the environment and human health. After deposition, ammonia contributes to soil acidification, and degradation. Most ammonia emissions can be attributed to farming; around three quarters comes from livestock effluent, and the rest from the application of mineral fertilizers (mainly urea).
Selecting fertilizer with a low volatilisation potential offers guaranteed efficiency and precise dosing.
Ammonia volatilisation is the process whereby NH4+ turns into its gaseous form NH3 and is released into the atmosphere. It occurs at the surface of the soil from an ammonia nitrogen source such as urea fertilizer (urea, nitrogen solution) or livestock effluent.
Nitrogen loss through ammonia volatilisation is closely related to soil conditions (pH, exchange capacity, porosity, water content etc.) and local weather conditions (rainfall, temperature, wind speed, humidity of the atmosphere, etc.). The chemical make-up of the mineral fertilizer (rich in urea nitrogen and ammonia nitrogen) and its form (liquid or solid) are important parameters that determine ammonia volatilisation.
Physical-chemical processes are involved:
Sulphur dioxide (SO2) emissions from industry have been reduced by more than 80% in the past 25 years and with that the atmospheric deposition of sulphur. For this reason, crops today need to be fertilized with sulphur.
Phosphorus and potassium fertilization is optimized in the long- term, based on the crop rotation. The method for PK fertilization considers four criteria: