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Vincent M. Russo and James Shrefler

. Shrefler et al. (2011) used hoop houses to produce spring transplants of bulb onions ( A . cepa L. Cepa group). Although not completely analogous, it was determined that onions could be grown to bunching onion size over winter in Oklahoma using this type

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Rolston St. Hilaire, Theodore W. Sammis, and John G. Mexal

construct a greenhouse is a potential gap in many horticulture curricula. In contrast, field hoop houses average less than $1.5/ft 2 , thereby overcoming the financial limitation of building a greenhouse. Also, hoop houses are relatively easy to construct

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Mark E. Uchanski, Kulbhushan Grover, Dawn VanLeeuwen, and Ryan Goss

) also found that students in outdoor settings learn better than those in indoor settings. High tunnels, hereafter referred to as hoop houses, are temporary plastic-covered structures used to extend the growing season by keeping the temperatures

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Emmanuel Alves Dos Santos Hecher, Constance L. Falk, Juliette Enfield, Steven J. Guldan, and Mark E. Uchanski

Often called hoop houses, high tunnels are constructed by stretching a layer of polyethylene plastic over hoops of metal or polyvinyl chloride (PVC). Most high tunnels rely on passive ventilation through roll-up sides, large doors, or removable end

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Şemsettin Kulaç, Pascal Nzokou, Deniz Guney, Bert Michael Cregg, and Ibrahim Turna

. Material and Methods The study was conducted in four hoop houses running east to west at the Tree Research Center (lat. 42.65° N, long. 84.42° W) on the campus of Michigan State University. The hoop houses were designed to keep rain from falling directly on

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Desire Djidonou and Daniel I. Leskovar

commercially grown lettuce cultivars in response to N concentrations during three consecutive production seasons in an NFT hydroponic system. Materials and Methods Plant source and seedling production. The study was carried out in an unheated hoop house located

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Kellie J. Walters, Bridget K. Behe, Christopher J. Currey, and Roberto G. Lopez

697 m 2 , respectively. Firms produced crops in greenhouses (64%), indoors in multilayer (31%) or single-layer (7%) facilities, and hoop houses or high tunnels (29%; data not shown). Fig. 1. The area of production dedicated to hydroponics per producer

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H.S. Costa, K.L. Robb, and C.A. Wilen

A field study was conducted to assess the effect of various commercially available polyethylene plastic greenhouse coverings on the persistence of viable spores of the microbial insecticide Beauveria bassiana. Selected coverings blocked the transmission of UV light with wavelengths of 360 nm and below or 380 nm and below. Two coverings also contained an infrared blocking component. A commercial formulation of B. bassiana was applied for 3 consecutive weeks to plants growing in the plastic covered hoop houses. The percentage of viable spores was calculated up to 13 days after the final application. The persistence of viable B. bassiana spores was significantly longer under the plastic that blocked a greater portion of the UV spectrum (<380 nm) than the plastics that only blocked UV wavelengths below 360 nm. One week after application, percentage of spore germination was at least twice as high under the <380 nm blocking plastic compared to <360 nm blocking plastics.

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are comparable to those achieved in a study in Brazil, may encourage farmers and agricultural stakeholders to consider organic farming as a viable alternative to conventional farming systems in tropical and subtropical countries worldwide. Hoop House

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Allen V. Barker

greenhouse was built with mostly salvaged materials. The second chapter discusses greenhouses as growing-season extenders. Several crop-protection methods and structures are mentioned, including no protection, row covers, hoop houses, and various types of