Premium
Annual Bluegrass Seedhead Emergence as Predicted by Degree‐Day Accumulation 1
Author(s) -
Danneberger T. K.,
Vargas J. M.
Publication year - 1984
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1984.00021962007600050012x
Subject(s) - poa annua , perennial plant , agronomy , biology , production (economics) , degree (music) , poaceae , physics , acoustics , economics , macroeconomics
Seedhead production of annual bluegrass ( Poa annua L.) during the spring reduces annual bluegrass root production and disrupts the aesthetic and playing qualities of the turf. A method of predicting when annual bluegrass seedheads visually emerge through maximum production would be a benefit to turf managers in that management practices such as vertical mowing and core cultivation could be suitably adjusted. A model to predict the number of seedheads from visual emergence through maximum production for a perennial annual bluegrass turf was developed from three field locations in Michigan. The proposed model is seedhead no. = −6249.4 + 41.099 (DD) − 0.08573 DD 2 + 0.0000575 DD 3 where DD = degree‐day accumulation above 286 K beginning April (R 2 = 0.65).