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Vincent M. Russo and Merritt Taylor

than for conventionally produced crops. Russo and Taylor (2006) determined that although yields were generally increasing for vegetables during the 3-year transition period, costs were higher than for conventionally grown vegetables. Regardless of

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V.M. Russo and Merritt Taylor

Many producers who have used conventional production methods for vegetables, and who want to convert to organic production, will have to pass through a 3-year transition period before their land can be qualified for organic certification. This transition can produce unique challenges. Use of several amendments has received interest for inclusion in organic production. How these affect vegetable production during the transition period was examined. Land was taken from perennial pasture and converted to production of the vegetables: bell pepper (Capsicum annuum L.), cv. Jupiter; processing cucumber (Cucumis sativus L.), cv. Earli Pik; and sweet corn (Zea mays L.), cv. Incredible (se endosperm genotype) using organic materials and methods with comparison made to production using conventional methods. Conventional and transition to organic portions of the field were separated by 25 m with the buffer zone planted with the same sweet corn cultivar used in the experimental plots and minimally maintained by addition of organic fertilizer. To the organic portion of the field, three levels of humates (0, 112, and 224 kg·ha–1) and three levels of corn gluten meal (0, 448, and 896 kg·ha–1) were applied in nine combinations. Yields for all crops were determined for all years. In the first year, bell pepper yields for plants under conventional production were higher than for the plants in the transition plots. In the remaining 2 years, bell pepper yields were similar under the two production systems. In the first 2 years, cucumber yields for plants under conventional production were higher than for the plants under transition to organic production. In the last year, cucumber yields were similar under the two production systems. In all years, sweet corn yields for plants under conventional production were higher than for plants under transition to organic production. Humates and corn gluten meal did not benefit yields of crops. An economic analysis comparing yields, prices, and costs of production of the crops under conventional and the transition to organic indicated that conventional practices generally provided more net revenue than did transition to organic production. Net revenue for the three species under the transition to organic for the 3 years was $2749 for three hectares. Net revenue for the three crops under conventional production for 3 years was $61,821, a difference of $59,072. Costs, yield, and prices will have to be considered when decisions are made concerning the adoption of organic practices.

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William J. Sciarappa, Vivian Quinn, and Daniel L. Ward

. Zhang (2005) found multimedia methods superior to conventional lecture/text presentation in online learning and knowledge gain. Computer instruction using photographs on the web was found superior to live laboratories in plant identification at Texas

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Paul B. Francis and C. Robert Stark, Jr.

). In one e-mail survey, production method (organic or conventional) had a lower relative importance than tomato type, but the authors noted that participants younger than 38 years placed more importance on production method, lycopene content, and tomato

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Mary Jane Clark and Youbin Zheng

conventional and organic fertilizers for containerized northern highbush blueberry production ( Miller et al., 2006 ; Smolarz, 1985 ). Therefore, further research is needed to develop nutrient management strategies for potted blueberry plant production in

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Guochen K. Png, Katherine S. Downes, and Beng H. Tan

effectiveness of some conventional (seeds and stem cuttings) and in vitro (micropropagation) propagation techniques and to determine the optimum conditions for these techniques. Materials and Methods Seed source. Seeds of L. macrantha were purchased from

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Wendy A. Johnson, Raymond A. Cloyd, James R. Nechols, Kimberly A. Williams, Nathan O. Nelson, Dorith Rotenberg, and Megan M. Kennelly

conventional fertilizers such as ammonium nitrate, ammonium sulphate, and potassium nitrate provide N in soluble ionic forms that are readily available for uptake by plant roots ( Mengel, 1992 ). Nitrogen supplied by fertilizers is known to influence plant

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Wenjing Guan, Xin Zhao, Danielle D. Treadwell, Michael R. Alligood, Donald J. Huber, and Nicholas S. Dufault

recognized ( Adam, 2005 ), limited information is available regarding cultivar selection for organic melon production. While performance of cultivars may differ significantly between organic and conventional systems ( Murphy et al., 2007 ), it is also

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Jennifer Tillman, Ajay Nair, Mark Gleason, and Jean Batzer

others, are indicators of soil health, as they can be used to measure the soil’s ability to sustain and support a viable ecosystem. Interest in preserving soil health and building topsoil is increasing among organic and conventional growers, and a focus

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Shaun R. Broderick and Williams B. Evans

requirements and are restricted in their use and access by the general public ( Lu et al., 2012 ; USEPA, 1995 ). Biosolids can be a valuable source of plant nutrients. In contrast with most conventional fertilizers, biosolids typically have lower levels of