Abstract:
Nitrogen is an essential plant nutrient, but
in excess amounts in the soil can cause significant water
quality problems. Since nitrate is very soluble and is not
retained by soil, it easily leaches into groundwater and
contaminates it. Therefore, modeling nitrate concentra
tion derived from N-fertilizer in the area where the land
dominating crop coverage helps to ensure the security of
soil and water and also the environmental sustainability
actions in the agricultural watershed. Adding N-fertilizer
without understanding the concentration of nitrates in
the soil and neglecting responsibilities and lacking con
cern of excess application of nitrogen N fertilizers on
agriculture can cause further problems on groundwa
ter resources. In order to evaluate nitrate contamination
on surface water and groundwater, estimating partial
nitrogen balance (PNB) in crop land is essential. The
objective of this study was to model the crop land par
tial nitrogen balance (PNB) for pre-assessment of nitrate
