Evaluation of irrigation scheduling approaches within sand‐capped turfgrass systems

Hejl, Reagan; Wherley, Benjamin; McInnes, Kevin J.; Straw, Chase M.; Fontanier, Charles

doi:10.1002/agj2.21059

Cited by 4 publications

(3 citation statements)

References 32 publications

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“…Results from multiple studies have shown that repeated use of recycled water as a turfgrass irrigation source resulted in a greater root zone EC, increased SAR, and increased sodium accumulation in leaf clippings (Lin and Qian 2019;Qian and Mecham 2005;Schuch et al 2008). Mitigation strategies do exist, such as planting salt-tolerant species, enacting salt leaching, and sand-capping (Carrow et al 2000;Duncan et al 2009;Dyer et al 2020;Hejl et al 2022); however, the determination of best management strategies could be improved by inclusion of more research parameterizing the impact of water quality on turfgrass water use and quality.…”

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confidence: 99%

Hybrid Bermudagrass Responses to Impaired Water Sources

Hejl

Williams

Monaco

et al. 2023

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Low-quality (i.e., impaired) water sources are commonly used to irrigate warm-season turfgrass landscapes as a result of limited supplies of potable water sources. Currently, there is great need to define the impacts of impaired water sources on turfgrass water consumption, growth, and quality. The objectives of this study were to characterize actual evaporation (ETa), clipping production, and quality of three hybrid bermudagrass varieties [‘TifTuf’, ‘Tifway’, and ‘Midiron’; Cynodon dactylon (L.) Pers. × C. traansvalensis Burtt Davy] grown under three water sources [reverse osmosis (RO), local well, and recycled], each supplied at full irrigation levels (1.0 × ETa) over two 8-week study periods. When pooling across water source and date, TifTuf maintained the highest visual quality and normalized difference vegetation index (NDVI) compared with both Midiron and Tifway. This was accompanied by a greater daily ETa rate, clipping production, and water use efficiency (WUE) compared with Midiron in both studies. When pooling across variety and date, daily ETa of turfgrass receiving recycled water was 5% to 10% less than those receiving the local well or RO water. In addition, turfgrasses receiving local well water held the greatest visual quality and NDVI compared with those receiving either RO water in the summer study. Visual quality and NDVI were also less in turfgrasses receiving RO water compared with those receiving local well or recycled water in the fall. Despite turfgrasses having a lower ETa under recycled water in both study periods, these plants had significantly greater clipping production compared with RO water in the summer. Also, clipping production under recycled water did not differ significantly from the other two sources in the fall study. Furthermoe, in both studies, WUE was similar for turfgrasses receiving recycled water compared with those receiving RO or local well water. Results demonstrated that irrigation water quality influences critical factors for hybrid bermudagrass growth and that considerable variability exists among three commercially available varieties for evapotranspiration rates, quality, and clipping production.

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confidence: 99%

Hybrid Bermudagrass Responses to Impaired Water Sources

Hejl

Williams

Monaco

et al. 2023

horts

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“…Study using wireless capacitance SMS over a wide soil moisture range and smart irrigation controllers resulted in significant water savings of up to 24-65% [99]. However, the water savings potential of SMS compared to conventional ET scheduling practices could be dependent on how SMS data is utilized [100]. Nevertheless, this type of irrigation management can provide increased irrigation efficiency by allowing for increased control of the high degree of soil moisture variability present on golf courses due to different soil types, topography, and other factors [101][102][103].…”

Section: Irrigation Application Methods and Schedulingmentioning

confidence: 99%

Pertinent Water-Saving Management Strategies for Sustainable Turfgrass in the Desert U.S. Southwest

et al. 2022

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Drought and heat stresses are major challenges for turfgrass management in the desert southwest of the United States where rainfall is insufficient to support managed turfgrass growth. Irrigation water availability and its quality are increasingly strained due to diminishing surface water supplies. Unprecedented drought conditions threaten the reliance on groundwater supplies that are heavily scrutinized for irrigation practices on landscape and recreational turfgrass. Therefore, development of drought tolerant cultivars, lower input turf management strategies that sustains turfgrass appearance and performance with less irrigation water, and tolerance to higher seasonal temperatures will be critically important. Sustainability of acceptable quality turfgrass can be accomplished through harnessing the natural genetic variation, genetic manipulation using modern genomic technology, and optimizing turfgrass management practices for improved drought tolerance. Besides persistent efforts of varietal development and improved turfgrass management for drought tolerance and performance, redefining the quality of irrigated turfgrass for consumers to align with the environmental conditions is envisioned to foster a sustainable golf, sports fields, and landscape turfgrass industry in the region. A comprehensive study encompassing different turfgrass species and enhancing management practices to achieve acceptable performing turfgrass as well as outreach education to improve public perception of realities for a “green” environment will be critically important. The recent developments in turfgrass science and contemporary communication platforms are instrumental in increasing awareness for a sustainable turfgrass paradigm and sustain eco-tourism of the region.

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“…To evaluate turfgrass performance, temporal and spatial soil moisture, and salinity dynamics, four irrigation scheduling approaches were compared. The results provide essential information to guide adopting data-driven approaches to irrigation scheduling [8].…”

Section: Introductionmentioning

confidence: 99%

Intelligent Control Technology and System of on-Demand Irrigation Based on Multiobjective Optimization

et al. 2023

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To solve the problem that the parameters of the multiple-input multiple-output (MIMO) irrigation system are difficult to control accurately, an on-demand irrigation control experimental device was developed. The main input parameters of the device are the opening degree of the main pipe valve, the opening frequency of and the pump station, the opening degree of the branch pipeline valve with the different combinations of different opening degrees. Based on these input parameters, four types of experimental methods were designed, and a total of 1695 groups of experiments were designed. The results show that the different opening degree combinations of the branch electric valve cannot significantly affect the flow of the branch pipeline but also significantly affect the pressure of the main pipeline. The prediction error of the operating frequency of the pump station and the opening degree of the branch valve were regarded as the objective function. Six intelligent prediction models were constructed, which are Back Propagation (BP), support vector regression (SVR) Linear, SVR-RBF, SVR-Poly, random forest (RF) and eXtreme Gradient Boosting (XGBoost), respectively. The results show that the XGBoost is the best model among the six models. For the opening degree of three branch valves, the mean absolute error (MAE) between the predicted value and actual value is less than 3.3%, the mean square deviation (RMSE) between the predicted values and actual values is less than 4.5%, and the R2 of between the predicted values and actual values is greater than 0.990. The control models and system can meet the needs of an on-demand irrigation system.

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Evaluation of irrigation scheduling approaches within sand‐capped turfgrass systems

Cited by 4 publications

References 32 publications

Hybrid Bermudagrass Responses to Impaired Water Sources

Hybrid Bermudagrass Responses to Impaired Water Sources

Pertinent Water-Saving Management Strategies for Sustainable Turfgrass in the Desert U.S. Southwest

Intelligent Control Technology and System of on-Demand Irrigation Based on Multiobjective Optimization

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