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Stacy A. Adams, Ellen T. Paparozzi, and W.W. Stroup

`Dark Red Annette Hegg' poinsettias (Euphorbia pulcherrima Willd. ex Klotzsch) were grown in a 1 peat : 1 perlite : 1 vermiculite medium using a pinched production schedule with varying N and S fertilizer application rates. Fifty-six treatments consisting of eight N levels (100 to 275 mg·L−1 in 25-mg·L−1 increments) and seven S levels (0 to 75 mg·L−1 in 12.5-mg·L−1 increments) were supplied. Other required nutrients were supplied at commercial recommendations for all treatments. Foliage of each plant was evaluated quantitatively by chromometer readings every 3 weeks. Marketability was determined by sensory evaluations from commercial producers, retailers, and consumers. Results indicated distinct color differences (hue, chroma, value) between S levels of 0 and 12.5 mg·L−1 and a slight difference between S at 12.5 and 25 mg·L−1. The foliage of plants receiving 0 S was lighter, more vivid, and more yellow-green in color. As N levels increased, there was a linear response; foliage became more green, darker, and more dull. Commerical and consumer evaluators rated plants that received S at 0 or 12.5 mg·L−1 at all N levels and plants receiving N at 100 mg L−1 as unmarketable. This research indicates that `Annette Hegg' poinsettia requires S at a minimum of 25 mg·L−1 and N at a minimum of 125 mg·L−1 for commercial acceptance, and commercial N application rates may be greatly reduced when adequate S is supplied.

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Zhanao Deng, Fahrettin Goktepe, and Brent K. Harbaugh

asexually propagated through tuber division ( Wilfret, 1993 ). The ornamental value of caladium in the container or in the landscape depends, to a large extent, on its leaf characteristics, including leaf shape, color, and color pattern. Improving these

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Suparna K. Whale and Zora Singh

warmer parts of the world, including the Mediterranean regions, California, South Africa, and Australia. However, optimum fruit color development, particularly red blush at harvest, is still a major problem with ‘Pink Lady’ apples in these apple

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Dennis R. Decoteau

effects attributed to the use of plastic mulch appear directly related to changes in plant microclimate ( Decoteau, 2005 ; Decoteau et al., 1986 ; Kasperbauer and Hunt, 1998 ). We have previously reported that mulch surface color can influence tomato

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Michael J. Costello and W. Keith Patterson

, 2012 ). We present the results of these studies on fruit production and wine color as an indicator of quality. Water application and stomatal conductance ( g S ) results from one of the study sites and years (Frankel in 2001) are presented here

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Taku Shimizu, Kazuma Okada, Shigeki Moriya, Sadao Komori, and Kazuyuki Abe

vegetables, including apple ( Malus × domestica ), causes their surfaces to turn a brownish color ( Pristijono et al., 2006 ). These color changes (hereinafter referred to as “browning”) are caused by phenolic oxidation reactions catalyzed by polyphenol

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Zhanao Deng and Brent K. Harbaugh

with two alleles that are inherited independently from leaf shape but closely linked with the color of the main vein ( Deng et al., 2008 ). Another major foliar trait in caladium is leaf blotching, the occurrence of numerous irregularly shaped color

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Ugur Bilgili, F. Olcay Topac-Sagban, Irfan Surer, Nejla Caliskan, Pervin Uzun, and Esvet Acikgoz

available nutrients in sewage sludges. The color of turfgrass produced from composted-sewage sludge amendments was comparable to that of turfgrass fertilized with ammonium nitrate ( Angle, 1994 ; Markham, 1998 ). Moreover, if turfgrass receives adequate

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Jacques R. Fouché, Stephanie C. Roberts, Stephanie J.E. Midgley, and Willem J. Steyn

problem. To increase GS Class 1 fruit by decreasing sunburn, red blush, and peel whitening, it is necessary to have a sound understanding of green color development in apple peel and how it is affected by the light environment. The main objective of this

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Jonathan Phillips, E. Jay Holcomb, and Kathleen Kelley

, 2005 ). Color has a great impact on human consciousness. Colors have the ability to evoke emotions or feelings in humans simply by being viewed. Red, for example, tends to be an exciting color, whereas blue tends to have a calming effect. To this extent