Fig. 5. Mean soil NO3–N desorbed from in situ anion exchange membranes in relation to N application rate for a mixed cool-season turf lawn grown on a fine sandy loam soil in Connecticut. Soil NO3–N values were averaged by treatment from 23 dates across two growing seasons. N was applied in 6 mo each growing season, May through October, for a total of between 0 and 587 kg ha–1 yr–1 A fitted model consisting of an exponential curve segment and a linear segment is shown.