Modeling fate and transport of ammonium, nitrite, and nitrate in a soil contaminated with large dose of urea

Soil or groundwater potential contamination generated by urea spills during its manufacture process is unknown. The aim of this work is determining the fate and transport of Nitrogen (N) species (ammonia, nitrites, and nitrates) when high doses of urea are spilled on to the soil surface. Fertilizer concentrations applied to soil surface were in the range from 167 to 301 g N m−2. HYDRUS 2D was applied to simulate N-species transport in the...