No abstract

No abstract

No abstract

No abstract

Water samples from an agricultural and a forested watershed (33,180, and 4,090 ha, respectively) were analyzed during the 1979 water year to determine the concentration of NO3‐N, NH4‐N, NO2‐N, and organic‐N. Monthly fluctuations in the concentration of NO3‐N from the agricultural watershed may represent an interaction of organic matter mineralization and N fertilization at the time of seeding. From both watersheds NO3‐N and NH4‐N concentrations do not exceed the upper limits recommended for drinking water.From both watersheds practically all monthly N losses, calculated as the product of the average flow and the respective average N concentration, occur during late autumn and winter and are more dependent upon total flow than upon concentration and land use. From the forested watershed yearly organic‐N and NO3‐N losses account for the same proportion of total N losses. From the agricultural watershed yearly NO3‐N losses, owing to higher concentrations, are nearly double the organic‐N losses.