Topeka-State investigators have lifted an advisory to farmers to avoid using water from two streams for livestock. The advisory was issued for two streams in Jackson and Atchison counties in northeast Kansas nearly a week after a dry float spreader truck mishap dumped 6,200 pounds of granular fertilizer in Spring Creek. The Kansas Dept. of Health and Environment and Dept. of Wildlife said concentrations of ammonia and nitrates had returned to a safe level after sampling indicated elevated levels from the March 7 incident. No dead fish had been found in the two streams. The mixture of solid urea, MAP, and potash spilled from the spreader truck about three quarters of a mile south of Highway 9 on the Nemaha-Jackson County line.