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

under greenhouse conditions. In particular, such transgenic plants have not been grown using the cultural practice required for high fruit yield over an extended period of time, including the commercial standard hydroponic, high-wire production system

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Constantinos Tzerakis, Dimitrios Savvas, Nick Sigrimis, and Georgios Mavrogiannopoulos

There is an increasing need in hydroponic systems to recirculate and reuse nutrient solutions (NS) so as to avoid contamination of groundwater by fertilizer residues and reduce the production cost ( Gutiérrez et al., 2007 ; Van Os et al., 2008

Open access

Hunter A. Hammock, Dean A. Kopsell, and Carl E. Sams

concentrations in greenhouse hydroponic basil ( Ocimum basilicum var. ‘Genovese’). Unlike previous studies, this project places emphasis on determining the optimal narrowband B/R ratio compared with HPS lighting under greenhouse conditions, the impact of season

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C.L. Mackowiak, R.M. Wheeler, G.W. Stutte, N.C. Yorio, and L.M. Ruffe

Peanut (Arachis hypogaea L.) plants were grown hydroponically, using continuously recirculating nutrient solution. Two culture tray designs were tested; one tray design used only nutrient solution, while the other used a sphagnum-filled pod development compartment just beneath the cover and above the nutrient solution. Both trays were fitted with slotted covers to allow developing gynophores to reach the root zone. Peanut seed yields averaged 350 g·m-2 dry mass, regardless of tray design, suggesting that substrate is not required for hydroponic peanut production.

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C. Elizabeth Succop and Steven E. Newman

Fresh-market basil is becoming a viable greenhouse commodity in Colorado. Marketing pressures and profit advantages also encourage the production of certified organic produce. The research objectives were to determine the length of time basil plants were productive in the greenhouse and to compare the production of fresh-market basil grown with three root zone systems and two fertilizer treatments. The three systems were hydroponic rockwool slab culture, hydroponic perlite raised bed culture, and hydroponic peat/perlite/compost bag culture. The two types of hydroponic fertilizer treatments were an inorganically formulated nutrient solution and an organic solution consisting of fermented poultry compost, hydrolized fish emulsion, and soluble kelp. The plants were harvested once per week and fresh weight was determined. During the 2nd and 3rd months of harvest, productivity from the plants treated with the organic fertilizer was greatest in the perlite system. However, productivity from the plants treated with the traditional fertilizer was greatest in the bag mix and rockwool systems.

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Eddie B. Williams, William F. Hayslett, and Sabrina L. Shaw

Seeds of Dynamo white geraniums were started in a soilless media in the germination chamber. After germination, one-third of the plants were placed under an intermittent mist system, and two-thirds were placed in rockwool cubes (7.62 cm × 7.62 cm × 6.35 cm) and placed into the hydroponics system. Plants that were placed under the mist system were transplanted into 16 cm × 16 cm (width × depth) plastic pots containing a soilless media of 1 peat moss: 1 perlite (v/v). After 45 days, half of the hydroponically grown plants were transplanted into 16 cm × 16 cm plastic pots containing peat moss and perlite. Observations included final plant height, top fresh weight, and top dry weight. The hydroponically-grown geraniums were significantly taller than the pot-grown geraniums and the hydroponic/pot-grown geraniums, 58.17 cm, 36.42 cm, and the 41.75 cm, respectively. The hydroponically grown plants were also significantly higher in top fresh weight and top dry weight.

Open access

L. Art Spomer


A method utilizing small, bouyant particles in a floating mat for the hydroponic germination and growth of small plants is described. The bouyant mat supports the seeds and small plants on the culture solution surface and allows easy, non-destructive removal of the plants analysis and re-insertion. This method was used successfully to germinate and grow seedlings of bluegrass (Poa pratensis L.)

Open access

Daniel P. Gillespie, Gio Papio, and Chieri Kubota

, Arizona, New Jersey, and Texas (USDA NASS, 2019), where spinach is grown in conventional open field production systems. In recent years, the growing number of greenhouse and indoor hydroponic operations has increased the availability of clean, locally

Open access

Daniel P. Gillespie, Chieri Kubota, and Sally A. Miller

the country. Hydroponic production in controlled environments allows year-round local production of perishable fresh produce in densely populated areas, closer to the point of consumption. As a result, hydroponic basil quickly became a major product

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David G. Himelrick and W. A. Dozier Jr

`Chandler' strawberry plants were grown in a nutrient flow hydroponic systems with six solution N treatments (35, 70, 140, 210, 280, 350 ppm). Total N was determined in leaf blade and petiole samples using Kjeldahl procedure and by LECO CHN analyzer. Nitrate-N was extracted with KCl and analyzed using a LACHAT ion analyzer. Correlations for total N in leaf blades with hydroponic N levels were r7 = 0.79 for Kjeldahl, r2 = 0.25 for LECO, and r2 = 0.60 for LACHAT while petiole samples were r* = 0.57 for Kjeldahl, r2 = 0.55 for LECO and r2 = 0.41 for LACHAT. Vegetative characteristics of the plants were affected with the 210 ppm treatment producing both the most crowns and runners and 350 ppm the least.