Search Results

You are looking at 1 - 9 of 9 items for :

  • "dark green color index" x
Clear All
Full access

Alexander R. Kowalewski, Brian M. Schwartz, Austin L. Grimshaw, Dana G. Sullivan and Jason B. Peake

determined that trafficked plots had lower NDVI values than untrafficked plots. Table 2. Effects of location and hybrid bermudagrass variety on quantitative measures, normalized difference vegetation index (NDVI), dark green color index (DGCI) and green turf

Full access

Mingying Xiang, Justin Q. Moss, Dennis L. Martin and Yanqi Wu

), turf quality (TQ), normalized difference vegetation index (NDVI), dark green color index (DGCI), and visual rating (VR) for 10 common bermudagrass and ‘SeaStar’ seashore paspalum under nonsalinity control and salinity treatment of 15 dS·m −1 . Before

Full access

Landon D. Bunderson, Paul G. Johnson, Kelly L. Kopp and Adam Van Dyke

number of pixels in the photograph. The digital image analysis of color, or measure of greenness, evaluated the shades of green in the stand. The dark green color index (DGCI) was calculated using red, green, blue, hue, saturation, and brightness data as

Restricted access

Zhao Xiang, Zhu Huisen, Gao Yang and Li Deying

same timeline as cultivar difference ( Table 3 ). The cultivar-by-salt interaction effect on DGCI was concurrent with that on visual quality, which was significant in 6 of 10 assessments ( Table 3 ). Table 3. Dark-green color index of tall fescue turf

Free access

Brian M. Schwartz, Ryan N. Contreras, Karen R. Harris-Shultz, Douglas L. Heckart, Jason B. Peake and Paul L. Raymer

within the 5 m × 6 m field plots of each cultivar. Digital image analysis as described by Karcher and Richardson (2003) was used to calculate the dark green color index (DGCI) of the same 0.5 m 2 areas that were visually rated for color. The

Restricted access

Mingying Xiang, Justin Q. Moss, Dennis L. Martin, Kemin Su, Bruce L. Dunn and Yanqi Wu

control, the FSNDVI at the 15 dS·m −1 salinity treatment FSNDVI of each entry declined significantly when compared with the control treatment ( P = 0.001) ( Table 3 ) and continued to decline as salinity level increased ( Table 2 ). Dark green color

Full access

morphological characteristics. Regression analysis determined that dark green color index had a negative correlation to wear tolerance. Dark green color index had the strongest correlation to wear tolerance of the characteristics assessed. Leaf length and width

Open access

Brian M. Schwartz, Wayne W. Hanna, Lisa L. Baxter, Paul L. Raymer, F. Clint Waltz, Alec R. Kowalewski, Ambika Chandra, A. Dennis Genovesi, Benjamin G. Wherley, Grady L. Miller, Susana R. Milla-Lewis, William C. Reynolds, Yanqi Wu, Dennis L. Martin, Justin Q. Moss, Michael P. Kenna, J. Bryan Unruh, Kevin E. Kenworthy, Jing Zhang and Patricio R. Munoz

an irrigated, nonstressed field trial in Tifton, GA, during 2012 and 2013 revealed that DT-1 generally had a lower dark green color index value than other cultivars under evaluation throughout the growing season ( Table 3 ). DT-1 was similar in color

Full access

Yang Gao and Deying Li

digital camera (Power Shot G3; Canon, Tokyo, Japan) with settings of F2.0 and 1/60 s. The digital pictures were then analyzed using the software package NIH Image 1.45i (National Institutes of Health, Bethesda, MD). Turfgrass green density and dark green