Microclimate during wet periods on differently sheltered turf grass swards1
- T.J. Gillespie
Air temperature, leaf wetness duration, and wind were measured at the mown surface of three differently sheltered creeping bentgrass swards (Agrostis palustris Huds. ‘Penncross’) as an aid to understanding the higher incidence of fungal diseases on turf protected from sun and wind. The turfgrass was managed as a golf course putting green. One site was open to sun and wind, the second was artificially shaded from the morning sun by snowfencing until 11 a.m., while the third site was enclosed in all directions by a similar fence shelter.
All sites had similar temperatures during rainy periods. During dew periods the open site was slightly warmer than the shaded turf but cooler than the enclosed site. A wind speed of about 2 m/sec at 5 cm above the turf was found sufficient to prevent dew onset.
Dew periods on the open turf were of about 2½ hours shorter duration than on the shaded site, but about 2 hours longer than on the enclosed site. Despite a 100% difference between wind speeds at the two protected sites, morning drying after a night rain at both sites was about equally delayed until after the open turf dried. This implies that modification of the shelter around a green to provide increased direct sunlight will enhance rapid drying far more than will increasing wind flow alone. Additional index words: Agrostis palustris Huds. Penncross, Air temperature, Wind.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
Copyright © 1974. . Copyright 1974 by the American Society of Agronomy, Inc. and the Crop Science Society of America, Inc., 5585 Guilford Rd., Madison, WI 53711 USA