Permanent vegetative buffers such as agroforestry and grass
buffers, grass filter strips, and riparian practices reduce non-point
source pollution (NPSP) from agricultural lands (Gilliam, 1994;
Udawatta et al., 2002). These environmental benefits are attributed
to physical, biological, and chemical changes in the soil and
vegetation. Improvements in soil porosity, water storage, and
infiltration influence water movement within the soil and therebypores which will improve plant growth. Literature shows increased
macroporosity under permanent vegetation can reduce contaminant
losses from NPSP (Edwards et al., 1988; Sklenicka et al., 2002).