Diffuse N discharge dynamics are determined by soil composition
and structure, which may vary at diverse scales (Gutierrez and
Baran, 2009). Understanding the spatial relationships of diffuse N
pollution yield with soil property parameters in an agricultural
basin is not only useful for balancing fertilizer but also for
predicting the potential pollution loading in an effective way. The
objectives of this research were: (a) to determine the spatial
distributions of diffuse N loading and eight soil property
parameters at the sub-basin scale and analyze their spatial
relationships, (b) to determine which soil parameters can be used
to reliably assess the diffuse N loading, and (c) to understand the
relationship of soil properties at two depths with the diffuse N
loading