15 Apr 2019
Understanding Carbon Footprint in Production and Use of Landscape Plants
Ingram, D.L. (University of Kentucky), Hall, C.R. (Texas A&M University), and J. Knight (University of Kentucky)
Understanding carbon footprint (CF) and the underlying science is important to minimizing the negative impacts of new product development and assessing positive or negative cradle-to-grave life-cycle impacts. Life cycle assessment was used to characterize representative production models of field-grown and container-grown landscape plants. The dominant contributor to CF and variable costs of field-grown trees is equipment use, the majority of which is at harvest. Plastics, energy use for irrigation, and fertilization are the major contributor to CF of container-grown plants. Greenhouse heating can also be impactful on the CF of plants depending on the location of the greenhouse and the length and season(s) of production. Knowing the input products and activities that contribute most toward CF and costs allows nursery and greenhouse managers to consider protocol modifications that are most impactful on profit potential and environmental impact.
2 Apr 2019
Removal of Agrichemicals from Water Using Granular Activated Carbon Filtration
Grant, G.A., P.R. Fisher, J.E. Barrett, and P.C. Wilson (University of Florida)
The objective was to evaluate removal efficacy of agrichemicals from water using a small-scale granular activated carbon (GAC) system. Chemicals reduced below their minimum detection limits after 64 seconds of GAC filtration included acephate, flurprimidol, paclobutrazol, uniconazole, peracetic acid, DDAC, and chlorine. Percent reduction for other chemicals with 64 s GAC was 72.2% for bifenthrin, 89% chlorphyrifos, 85.3% imidacloprid, 99% glyphosate, 99.4% triclopyr, 99.3% hydrogen peroxide, 47.6% iron-EDDHA, and 94.6% soracid blue dye. GAC filtration can remove many agrichemical contaminants used in greenhouse and nursery production, although greater contact time would be needed in commercial production than in this study.
5 Mar 2019
Meeting US Nursery and Greenhouse Growers' Needs with Water Conservation Extension Programs
Sanagorski Warner, L.A. (University of Florida), Lamm, A.J. (University of Georgia), White, S.A. (Clemson University), Fisher, P.R., and P. N. Beattie (University of Florida)
In order for Extension professionals to effectively help growers use water conservation technologies, it is important to understand the knowledge level and adoption rates growers have surrounding different water conservation techniques. It is also important to understand how grower perceptions of water conservation strategies relate to their adoption. In this publication, we present results of a study designed to understand the knowledge level, adoption rate, and levels of continuance associated with eight water conservation technologies among nursery and greenhouse growers. We also examined whether five characteristics of these technologies (trialability, complexity, compatibility, relative advantage, and observability) predicted grower adoption.