Search Results

You are looking at 1 - 10 of 1,146 items for :

Clear All

for satisfactory control and maintenance of acceptable turfgrass quality. Currently available herbicides (e.g., topramezone, metribuzin) with activity on goosegrass also often result in unacceptable injury (bleaching) to the desirable turfgrass species

Free access

addition of metribuzin with diclofop improved control efficacy of mature goosegrass plants. End-user options for goosegrass control efficacy while maintaining acceptable turfgrass quality has decreased over the past decade or so, due to reduced performance

Free access

, the potential amount of buffalograss improvement for turfgrass quality, pest resistance, and stress tolerance that may be achieved through hybridization has not been established. It is essentially impossible to generate inbred buffalograss lines by

Free access

bulrush [ Bolboschoenus maritimus (L.) Palla], pigmy arrowhead ( Sagittaria pygmaea Miq.), and threeleaf arrowhead ( Sagittaria trifolia L.) under flooded conditions. Penoxsulam is an ALS inhibitor used for broadleaf weed control in managed turfgrass

Free access

Turfgrass is a natural plant that covers ∼2% of all continental land in the United States ( Harrington 2016 ; Milesi et al. 2005 ). It is considered the most irrigated crop in the country because of its extensive use as vegetative cover for home

Open Access

Factors affecting new turfgrass variety adoption have been a key interest of many stakeholders such as breeders, producers, and marketers in the horticultural production system because adopting new technology significantly affects the environment

Open Access

Differences in soil microenvironment affect the availability of N in small areas of large turfgrass stands. Optical sensing may provide a method for assessing plant N needs among these small areas and could help improve turfgrass uniformity. The purpose of this study was to determine if optical sensing was useful for measuring turfgrass responses stimulated by N fertilization. Areas of `U3' bermudagrass [Cynodon dactylon (L.) Pers.], `Midfield' bermudagrass [C. dactylon (L.) Pers. × C. transvaalensis Burtt-Davy], and `SR1020' creeping bentgrass (Agrostis palustris Huds.) were divided into randomized complete blocks and fertilized with different N rates. A spectrometer was used to measure energy reflected from the turfgrass within the experimental units at 350 to1100 nm wavelengths. This spectral information was used to calculate normalized difference vegetation index (NDVI) and green normalized difference vegetation index (GNDVI). These spectral indices were regressed with tissue N and chlorophyll content determined from turfgrass clippings collected immediately following optical sensing. The coefficients of determination for NDVI and GNDVI regressed with tissue N averaged r 2 = 0.76 and r2 = 0.81, respectively. The coefficients of determination for NDVI and GNDVI regressed with chlorophyll averaged r 2 = 0.70 and r 2 = 0.75, respectively. Optical sensing was equally effective for estimating turfgrass responses to N fertilization as more commonly used evaluations such as shoot growth rate (SGR regressed with tissue N; r 2 = 0.81) and visual color evaluation (color regressed with chlorophyll; r 2 = 0.64).

Free access

facility. Most golf facility acres (60%) are covered with turfgrass ( Gelernter et al. 2017 ). Turfgrass species and/or cultivars vary greatly according to numerous variables, including climate, topography, budget, and so on. As these variables change, so

Open Access

Traditional turfgrass management techniques require cultural inputs such as fertilizer, pesticides, irrigation, and mowing ( Williamson 2006 ). The recent green movement has caused concern over the fate of synthetic inputs in the world

Open Access

Turfgrass often requires supplemental nitrogen (N) applications to maintain acceptable aesthetics and functionality. The average 18-hole golf course in the United States applies N at 100 kg·ha −1 per year ( Environmental Institute for Golf, 2016

Open Access