Full TGIF Record # 19896
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Publication Type:
Author(s):Bridges, Barry; Powell, A. J. Jr.
Title:Kentucky bluegrass thatch studies: II. Thatch-lime study
Source:Kentucky Turfgrass Research. 1981, p. 30-32.
Publishing Information:Lexington, KY: University of Kentucky, College of Agriculture, Cooperative Extension Service
Keywords:TIC Keywords: Poa pratensis; Lawn turf; Thatch; Thatch decomposition; Soil pH; Dolomitic limestone; Lime; Liming; Calcium carbonate; Coring; pH
Abstract/Contents:1981 study to determine the effect of various lime treatments and coring on thatch decomposition in a Kentucky bluegrass lawn with a severe thatch and pH problem. This lawn has been maintained several years by a lawn service company and no history of liming was available. The following treatments were initiated on June 2, 1981 and the fluid lime and coring treatments were repeated November 3, 1981. Main plots: A) 150#/1000 sq ft of coarse grade, agricultural lime. B) 150#/1000 sq ft of finely ground dolomitic lime. C) 20# CaCO3/1000 sq ft as extremely fine fluid lime. D) Check - no lime. Split plots: A) coring - traversed plots in three directions with a Ryan Lawnaire equipped with 3/4" coring tines. B) no coring. A table provides pH of soil in top 4 cm and thatch (top and bottom) for lime treatments and check at 5 months after treatment. The coarse and fine lime showed similar effectiveness in raising the pH of the top thatch approximately one pH unit. The fluid lime raised the pH of the top thatch also, but not to the degree of the fine and coarse lime. All the liming materials were relatively ineffective in raising the pH of the bottom thatch and top four cm of soil. The fine lime showed some effectiveness, raising the thatch (bottom-half) pH approximately 1/2 of pH unit. Thatch thickness measurements were made on all treatments. Little differences were expected after the short time period between the application of the treatments in June and sampling in November. No differences were found among the lime treatments but coring resulted in a slight reduction of thatch in all treatments. Additional work to be done in 1982 includes thatch-thickness measurements, pH measurements, and the repeat of all mechanical treatments and fluid lime applications.
See Also:See also Part I: "Mechanical thatch study", p. 29-30, R=19889 R=19889

See also Part III: "Thatch-nitrogen study", p. 31-32, R=19899 R=19899
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Bridges, B., and A. J. Jr. Powell. 1981. Kentucky bluegrass thatch studies: II. Thatch-lime study. KY. Turfgrass Res. p. 30-32.
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