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Rosa E. Raudales, Tracy A. Irani, Charles R. Hall, and Paul R. Fisher

of these attributes. A modified Delphi survey method was used to evaluate these objectives. Results of this survey were intended as a first step to develop a framework of selection criteria for water-treatment technologies in irrigation for control of

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

strategy goals of providing optimum soil moisture for plant growth, productivity, and reduction of fertilizer nutrient leaching. The following section describes irrigation control options and the technologies involved in each. Soil moisture sensor

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Amy Fulcher, Anthony V. LeBude, James S. Owen Jr., Sarah A. White, and Richard C. Beeson

growers we spoke to mentioned new sensor technologies as an opportunity to monitor the need to irrigate container-grown crops. Practitioner concerns with sensor technology are cost and reliability when used to monitor water availability in containers and

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Laurence Gendron, Guillaume Létourneau, Julien Cormier, Claire Depardieu, Carole Boily, Raymond Levallois, and Jean Caron

training existing irrigators to implement such technology. Although the economic aspect makes the decision simple, the implementation at farm scale of such irrigation system for pulsed irrigation may require technical support because proper installation and

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H.C. Passam, A.B. Sideridis, and C.P. Yialouris

Vegetable production in low-technology (low-tech) plastic-covered greenhouses depends on low investment and cheap production methods that prohibit the adoption of expensive technologies. Nevertheless, advanced technology can be developed for this low-tech situation provided that a personal computer (PC) is available and the software is of low cost and specially designed to function without the need for additional expensive hardware. This will encourage the adoption of computer technology in an industry where computer illiteracy is still high. In the present paper, a decision support system for irrigation and fertilizer management of tomatoes [Lycopersicon esculentum (L.) Mill.] is described. The system is comprised of two modules: 1) an irrigation-fertilization consultation module for the management of water and fertilizer supply and 2) a diagnostic expert system module for the identification and rectification of nutritional disorders. Irrigation requirements are defined on the basis of daily evaporimeter readings. Fertilizer schedules are derived from the literature, but modified on the basis of experience gained during previous cultivations. The urgent need for such a management system is indicated by the relatively low quality of vegetable produce currently grown in low-tech greenhouses and the waste of precious water and fertilizer due to over-application by growers, with concomitant damage to the environment. During tests, irrigation was reduced by as much as 30% in comparison with empirical methods. To enable more widespread assessment and to increase its range of application, the software of this system is offered free of charge for evaluation by interested users.

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John Cline, Gerry Neilsen, Eugene Hogue, Shawn Kuchta, and Denise Neilsen

, a renewed interest in mulching technology has been documented ( Hogue et al., 2003 ; Merwin, 2003 ; Merwin et al., 1995 ), especially when land disposal of organic wastes is discouraged and recycling is an option. More recently, with bans placed on

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

satisfy peak seasonal demands during critical fruit set and early fruit development. During these phenological periods, good irrigation management is critical to reduce stress and the associated young fruit drop resulting in yield reduction. Historically

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William D. Wheeler, Paul Thomas, Marc van Iersel, and Matthew Chappell

relation to adoption of the new technology when the producer was allowed full system control, with no researcher input, after an initial training consultation. We hypothesized that soil moisture sensor-based automated irrigation would be readily adopted by

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Laura A. Warner, Alexa J. Lamm, Peyton Beattie, Sarah A. White, and Paul R. Fisher

who had implemented irrigation audits, climate-based irrigation, or soil moisture sensors were least likely to continue the use of these technologies. In some cases, it is possible the survey respondents did not have operations that allowed the use of

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Jeff B. Million and Thomas H. Yeager

promising, additional research was indicated to test the technology on a wider range of crops including sprinkler-irrigated plants and over greater production times. The objective of this study was to further evaluate this CIRRIG strategy by implementing an