This document appears to summarize the results of an experiment testing the effects of different watering frequencies on turfgrass growth and quality measurements. The experiment involved three treatment groups: a control with watering once per week, a second group watered three times per week, and a third group watered once per week. Over the course of several weeks, measurements were taken of temperature, precipitation, turfgrass height, and other metrics and compared across the treatment groups.

4. i
101
Control
201
1x/wk
301
3x/wk
ii
201
3x/wk
202
Control
203
1x/wk
iii
301
3x/wk
302
1x/wk
303
Control

13. 50
52
54
56
58
60
62
64
66
68
70
72
74
3-Sep 9-Sep 15-Sep 21-Sep 27-Sep 3-Oct 9-Oct 15-Oct 21-Oct 27-Oct 2-Nov
GMax
Temp (F) Precep Control 1x/Wk 3x/Wk

14. 16 %
20 %
24 %
28 %
32 %
36 %
3-Sep 9-Sep 15-Sep 21-Sep 27-Sep 3-Oct 9-Oct 15-Oct 21-Oct 27-Oct 2-Nov
Temp (F) Precipitation Control 1x/Wk 3x/Wk

15. 55%
60%
65%
70%
75%
80%
85%
3-Sep 9-Sep 15-Sep 21-Sep 27-Sep 3-Oct 9-Oct 15-Oct 21-Oct 27-Oct 2-Nov
Temp Precep Control 1x/Wk 3x/Wk

16. 0 ft
1 ft
2 ft
3 ft
4 ft
5 ft
6 ft
7 ft
8 ft
9 ft
10 ft
3-Sep 9-Sep 15-Sep 21-Sep 27-Sep 3-Oct 9-Oct 15-Oct 21-Oct 27-Oct 2-Nov
Avg Temp Precep Control 1x/Wk 3x/Wk

17. 9/3/13 11/4/13 Gains
Control 6’ 6’’ 7’ 9’’ +1’ 3’’
1x/week 6’ 6’’ 8’ 1’’ +1’ 7’’
3x/week 6’ 6’’ 8’ 6’’ +2’

18. 0 ft
1 ft
2 ft
3 ft
4 ft
5 ft
6 ft
7 ft
8 ft
9 ft
10 ft
11 ft
27-Sep 3-Oct 9-Oct 15-Oct 21-Oct 27-Oct 2-Nov
Avg Temp Precep Control 1x/Wk 3x/Wk

19. 9/3/13 11/4/13 Gain
Control 7’ 6’’ 9’ 6’’ 2’
1x/week 7’ 6’’ 10’ 3’’ 2’ 9’’
3x/week 7 ‘6’’ 10’ 3’’ 2’ 9’’

20. Stimp Meter Pelz Meter Difference
Control + 1’ 3’’ + 2’ + 9’’
1x/week + 1’ 7’’ + 2’ 9’’ + 1’ 2’’
3x/week + 2’ + 2’ 9’’ + 9’’
Stimp
difference
Correct
response
Partially correct
response
Incorrect
response
6 inch 18% 47% 35%
12 inch 55% 21% 24%
If Change in green speed < 6 in. golfer can’t perceive difference in green speed
(Karcher et al., 2001)
If Change in green speed > 6 in. golfer can perceive difference in green speed
(Karcher et al., 2001)

23. Beard, J.B. 2005. Beard's Turfgrass Encyclopedia For Golf Courses, Grounds,
Lawns, Sports Fields. Michigan State University Press.
Collins, Mark. "Question about Experiment Plot @ HTRC." Message to
Michael McKeel. 22 Nov 2013. E-mail.
Karcher, D., Nikolai, T., and Calhoun, R. 2001. Golfer's perceptions of greens
speeds vary: Over typical Stimpmeter distances, golfers are only
guessing when ball-roll differences are less than 6 inches. Golf
Course Manage. 69:57-60.
Nikolai, Thomas A. 2004. Golf Course Management. April. 72(4): p. 121-124.
Pelz, D. 2002. p. 748-760. In: Thain, Eric, ed. Science and Golf IV. London:
Routledge.