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R.L. Parish, R.P. Bracy, and H.F. Morris Jr.

A study was conducted to evaluate the effect of banding or broadcasting fertilizer on yield and quality of turnip (Brassica rapa L. Rapifera group), sweetcorn (Zea mays var. rugosa Bonaf.), and cabbage (Brassica oleracea L. Capitata group). Preplant fertilizer was applied broadcast before bedding, broadcast after bedding, or banded after bedding. Sidedress applications were broadcast or banded on the beds. Differences in plant size and vigor were noticed early in the season in the spring turnip crop, with the growth in the broadcast-and-bed treatment appearing superior. The yield at first harvest and total yield were lower for turnip grown with the bed-and-broadcast treatment. No differences in yield of cabbage or sweetcorn resulted from the treatments. Few differences in turnip stem-to-leaf ratio were noted due to fertilizer treatment. Few differences in yield due to sidedress method were noted with any of the crops. Analysis of soil samples in a grid pattern across the beds showed that the location of the fertilizer after the broadcast-and-bed treatment was similar to the placement of the banded fertilizer. Since broadcasting can be done with a faster, wider applicator, growers could reduce costs by broadcasting fertilizer and obtain yields that are at least equivalent to the yields obtained by banding the fertilizer.

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Richard L. Parish

Application of granular materials is an important part of most turfgrass maintenance programs, but is not often studied by horticulturists. Agricultural engineers have conducted many research studies over the past 50 years on the theory, testing, and use of granular applicators. Understanding the theory of granular distribution can aid horticulturists and turfgrass professionals in the effective use of spreaders. This article will review relevant engineering studies and interpret some of the results to provide help in using spreaders more effectively. Proper operating mode, proper pattern adjustment, and the use of an appropriate swath width can greatly improve pattern uniformity. For instance, a half-width pattern has been proven more effective at pattern improvement than right-angle patterns, and the detrimental effect of humidity on spreader pattern has been demonstrated.

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Steven E. Newman

172 WORKSHOP 28 Multimedia Computer Applications for Horticulture Teaching and Extension

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Sahar Dabirian and Carol A. Miles

and mitigate water stress, thereby maintaining plant growth and development ( Moftah and Al-Redhaiman, 2006 ). Such antitranspirant products can be applied to foliage or the root zone to counteract water stress. Application of an antitranspirant

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William B. Miller and Madeline W. Olberg

final height. For industry adoption, additional information on ethephon drench efficacy under different application scenarios is needed. For example, if a constant dose of ethephon is given, does drench volume alter the growth retarding effect? What

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John LeBoeuf

103 COLLOQUIUM 3 (Abstr. 643–649) Applications of Site-specific Management for Horticultural Crop Production

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D. Scott NeSmith

timing of CPPU application with respect to stage of plant development will likely govern its effectiveness. The objective of this research was to examine fruit set and berry weight of ‘Brightwell’, ‘Climax’, and ‘Tifblue’ rabbiteye blueberries under field

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G. Lightner

44 COLLOQUIUM 2 Issues and Applications of Computer Technology to Horticulture

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Vincent M. Russo and Merritt Taylor

with chicken litter, versus annual application of conventional fertilizer, affects yield, nutrient content of the soil and edible yield, and economics of production. Materials and Methods Site description and preliminary activities. The experiment was

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Xi Xiong, Ken Diesburg, and Daniel T. Lloyd

control of winter weeds on zoysiagrass turf ( Harrell et al., 2005 ; Johnson, 1980 ; Vargas and Turgeon, 2004 ). However, the main strategy adopted by golf course superintendents in this region is winter application of the non-selective herbicide