Several items of equipment able to realize site specific chemical application have been developed. Equipment for site specific chemical application needs a prescription map of the target area. The purpose of this work was to evaluate a practical method for weed mapping by driving over the patch contour with an All Terrain Vehicle (ATV). Two weed maps were created for the same agricultural field. The proposed method for weed mapping was considered efficient for the evaluated conditions. The weed maps obtained showed three infestations levels. An important conclusion obtained was that timing to perform the weed mapping is a very important factor to be considered for site specific chemical application.
patch spraying; precision farming; weed mapping
