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Desire Djidonou and Daniel I. Leskovar

preferences for clean and healthy produce. Hydroponics is a method of crop culture that emerged decades ago to grow fresh market leafy vegetables in a wide range of environments ( Resh, 2012 ). In particular, NFT is one variant of all hydroponic systems, where

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Hardeep Singh, Bruce Dunn, Mark Payton, and Lynn Brandenberger

releasing root exudates or exploring some new soil regions by growing their roots, whereas in hydroponics, all nutrients should be provided in adequate amounts unnaturally and may vary from crop to crop ( Page and Feller, 2013 ). There are various hydroponic

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C. Elizabeth Succop and Steven E. Newman

Fresh-market sweet basil (Ocimum basilicum) is in high demand from specialty produce markets and commercial restauranteurs. Many consumers are also demanding produce that has been organically grown. Three hydroponic media systems were evaluated twice over two years, rockwool slabs, perlite frames, and commercial sphagnum peat/perlite/compost medium, where the bag was laid flat on the bench. Plants grown in these systems were fertilized with nutrient solutions derived from either organic or conventional, saltbased fertilizer sources. Few differences in yield were detected between basil plants grown in the commercial medium with either fertilizer source. Total yield from plants grown in perlite with the organic fertilizer was 22% greater in the first study and 100% greater in the second study than those for plants grown with the conventional fertilizer. Plants grown in rockwool with the conventional fertilizer were 17% more productive in the first study and 46% more productive in the second study than those grown with the organic fertilizer. Taste test panelists (69%) could discern differences between samples from organically and conventionally grown basil plants, yet no preferences were shown.

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Ryo Matsuda, Chieri Kubota, M. Lucrecia Alvarez, and Guy A. Cardineau

dynamics of TSP or a target protein concentration in tomato fruit under high EC. The aim of this study was thus to investigate the effects of an increased EC of hydroponic nutrient solution on TSP and F1-V protein concentrations in fruit of the transgenic

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James C. Locke, James E. Altland, and Deanna M. Bobak

chlorophyll content than control plants, suggesting that N fertilization can be skipped for up to 8 d without loss of foliar color. Table 1. Mean SPAD chlorophyll readings for geraniums ( Pelargonium × hortorum ‘Red Maverick’) grown in hydroponic solution in

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Samuel Doty, Ryan W. Dickson, and Michael Evans

ornamental crops tend to differ in system design and nutrient and water delivery. Fresh market basil ( Ocimum basilicum ), for example, is typically produced in hydroponic systems in which plant roots are submerged in nutrient solution to promote maximum

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Martin Makgose Maboko and Christian Phillipus Du Plooy

Growing peppers in plastic tunnels has gained interest among hydroponic growers in South Africa, although high temperatures during the summer season limit crop yield. Seed suppliers are continuously improving sweet pepper varieties and recommend

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Kui Lin, Zhi Huang, and Yong Xu

·L −1 Ca, 1 mmol·L −1 Mg, and 1.67 mmol·L −1 S. After plants had been cultivated hydroponically for 3 weeks under conditions of 20 ± 2 °C and 75% ± 5% relative humidity, growth parameters and physiological and biochemical properties were measured

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David R. Hershey

Abstract

Shoot or leaf cuttings can be rooted in flats of perlite under intermittent mist for use in a static solution culture system (Hershey and Merritt, 1986). However, removing perlite from the roots before transfer to hydroponics is tedious and damages the roots; also, all the perlite cannot be removed, which causes errors in dry mass and nutrient concentration determinations. A hydroponic propagation system was constructed of inexpensive, readily available materials that allowed rooting of large numbers of cuttings under intermittent mist.

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Ahmet Korkmaz and Wallace Pill

Achievement of head size uniformity at final harvest reduces loss and increases profitability for the hydroponic lettuce grower. Shoot fresh weight of `Cortina' lettuce (Lactuca sativa L.) at 7 or 21 days after planting (DAP) was inversely proportional to the number of days required for seedling emergence, and was greater for raw than for pelleted seeds. Head fresh weight at final harvest (61 DAP) was directly proportional to seedling length at 21 DAP, but raw and pelleted seeds produced equal head weights. Thus, initial seed (seedling) vigor differences were maintained to final harvest. Osmotic seed priming (–1.5 MPa KH2PO4, 20 h, dark) led to increased germination rate at 15, 25, and 35C; had no effect on germination synchrony; and increased germination percentage only at 35C. Covering raw or pelleted seeds sown in depressions of the phenolic foam trays with fine (No. 5) vermiculite compared to leaving the seeds uncovered, and soaking the trays in hydroponic solution rather than water, increased seedling shoot fresh weights. Seeds sown on their first day of germination or primed seeds gave greater seedling shoot fresh weights than pelleted seeds. However, the more uniform seedling shoot fresh weights from germinated seeds than from primed seeds was associated with more rapid and synchronous seedling emergence.