Maximum total dry weight of the plant has occurred. Physiological maturity can be determined by the dark spot on the opposite side of the kernel from the embryo (see picture).the kernel on the left is physiogically mature one on the right is not.the time from flowering to physiological maturity varies with and environmental conditlons; however,it repressnts about one-third of the total time from planting. Grain moisture content at physioiogical maturity varies with hybrid and growing conditions also. It usually is between 25 and 35 pereent moisture.Afler physioigical maturity. The remaining functional leaves may stay green or die and brown rapidlg. It temperature and moisture condition and favorable, branches may start to grow from several of the upper nodes (placewhers leaes attach). Also the cuim or stalk weight may incrcase slightiy near physiological maturity