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Amanda Bayer

Reduced irrigation (RI) can be used to reduce irrigation volume as well as to control plant growth. The timing and duration of RI applications can affect overall plant growth and flowering. Knowledge of plant response to RI can allow growers to control growth and plant form. The objective of this study was to quantify flower and overall plant growth of ‘PAS702917’coneflower (Echinacea purpurea) and ‘Helbro’ sneezeweed (Helenium hybrida) in response to RI. A soil-moisture sensor automated irrigation system was used to apply four irrigation treatments: RI and well-watered (WW) controls (25% or 38%) and two alternating treatments to apply RI for either the first 2 weeks (25% followed by 38%, RIWW treatment) or final 4 weeks (38% followed by 25%, WWRI treatment) of the 6-week study. For the sneezeweed experiment, RI was reduced to 20%. For coneflower, peduncle length was greater for the WW (36.8 cm) and RIWW treatments (35.7 cm) than the RI (27.0 cm) and WWRI treatments (26.6 cm). Shoot dry weight, compactness, leaf area, and flower number were not significant. For sneezeweed, WW plants were taller (57.2 cm) and had greater shoot dry weight (49.8 g) than plants in other treatments. WW plants also had more flowers (99) than WWRI (63) and RI (67) plants, which were more compact. Total leaf area did not differ between treatments for either species. Total irrigation volume was greatest for WW plants (5.2 and 15.1 L/plant for coneflower and sneezeweed, respectively), with RI at any point during the experiment resulting in water savings.

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John C. Majsztrik, Elizabeth W. Price, and Dennis M. King

it, and benefits then level off. Fig. 1. Theoretical environmental benefits that can be gained from emerging wireless sensor irrigation network technologies (modified from National Research Council, 1997 ). Stages of technology development

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Michael D. Dukes, Lincoln Zotarelli, and Kelly T. Morgan

bell pepper ( Zotarelli et al., 2008a , 2009 ), turfgrass, and landscapes ( Dukes et al., 2007b ) with capacitance-based soil moisture sensor irrigation controllers. As an irrigation scheduling method, sensors have been promoted for many years and have

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Sueyde Fernandes de Oliveira Braghin, Simone C. Mello, Jéssika Angelotti-Mendonça, Keigo Minami, and Yuncong C. Li

or 12 g per pot before planting, whereas the WSF was applied by nutrient solution. Irrigation management and leachates analysis. Plants were drip-irrigated with an automated moisture sensor (Irrigation Controller-MRI; Hidrosense, Jundiai, Brazil

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Julián Miralles-Crespo and Marc W. van Iersel

efficiency of Gaura lindheimeri grown with capacitance sensor-controlled irrigation HortScience 43 1555 1560 Cardenas-Lailhacar, B. Dukes, M.D. 2010 Precision soil moisture sensor irrigation controllers under field conditions Agr. Water Mgt. 97 666 672 Cha

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Matthew Chappell, Sue K. Dove, Marc W. van Iersel, Paul A. Thomas, and John Ruter

based on soil moisture has been widely adopted by the greenhouse and nursery industry. One reason for a lack of adoption of soil moisture-based sensor irrigation systems by the commercial nursery and floriculture industry has been a reluctance to

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Maria C. Morera, Paul F. Monaghan, Michael D. Dukes, Ondine Wells, and Stacia L. Davis

:// > Haley, M.B. Dukes, M.D. 2012 Validation of landscape irrigation reduction with soil moisture sensor irrigation controllers J. Irrig. Drain. Eng. 138 135 144 Haley, M.B. Dukes, M.D. Miller, G.L. 2007 Residential irrigation water use in central Florida J