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Relationship of Turfgrass Growth and Quality to Soil Nitrate Desorbed from Anion Exchange Membranes

^a Dep. of Plants, Soils, and Biometeorology, Utah State Univ., 4820 Old Main Hill, Logan, UT 84322-4820
^b Dep. of Plant Science, Univ. of Connecticut, 1376 Storrs Road, U-4067, Storrs, CT 06269-4067

View larger version (42K): [in a new window]   Fig. 1. Mean monthly precipitation and temperature for the growing seasons of 1998 (A) and 1999 (B), as well as 30-yr normal values (C) for Storrs, CT.

View larger version (25K): [in a new window]   Fig. 2. Response of desorbed nitrate-N from anion exchange membranes to N fertilization rate when clippings were returned or removed at the Plant Science Research and Teaching Farm (RF) site, 1998 (A) and 1999 (B); and the Spring Manor Farm (SM) site, 1998 (C) and 1999 (D).

View larger version (36K): [in a new window]   Fig. 3. Relationship of relative clipping yield by harvest to desorbed NO3-N from anion exchange membranes in 1998. Although y-axis values are constant across harvests, x-axis values are variable. CRM, clippings removed; CRT, clippings returned.

View larger version (37K): [in a new window]   Fig. 4. Relationship of relative clipping yield by harvest to desorbed NO3-N from anion exchange membranes in 1999. Although y-axis values are constant across harvests, x-axis values are variable. CRM, clippings removed; CRT, clippings returned.

View larger version (40K): [in a new window]   Fig. 5. Relationship of overall turfgrass quality by rating period to desorbed NO3-N from anion exchange membranes in 1998. Although y-axis values are constant across harvests, x-axis values are variable. CRM, clippings removed; CRT, clippings returned.

View larger version (39K): [in a new window]   Fig. 6. Relationship of overall turfgrass quality by rating period to desorbed NO3-N from anion exchange membranes in 1999. Although y-axis values are constant across harvests, x-axis values are variable. CRM, clippings removed; CRT, clippings returned.