The application of GPS for weed investigation in winter wheat field

The application of GPS for weed investigation was introduced in this paper. The different scouting approaches for weeds in fields are presented. Two kinds of systems which are included in investigation are analyzed. There are four ways of making field investigation for weed relative information of density and position. The quick assessment is very fast and easy to implement. It works for perennial weeds. The regular grid sampling is a way that can be adopted by farmer for weed scouting, but it sometimes is time and labor consuming. The way of sampling at harvest is a map that is matched to the yield map, but it is an ℌafter the factH. Adaptive sampling using aerial imagery can offer a potential way for weed investigation. There is an example of weed investigation in winter wheat field showed the weed distribution of position and varieties.