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Xiaoyan Dai, Donald M. Vietor, Frank M. Hons, Tony L. Provin, Richard H. White, Thomas W. Boutton and Clyde L. Munster

Top-dressings of composted municipal biosolids (CMB) increase nutrient concentrations in soil and clippings and enhance turfgrass color, quality, and growth ( Garling and Boehm, 2001 ; Hansen et al., 2007 ; Johnson et al., 2005 ). In addition

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Kimberly K. Moore

Florida Agricultural Experiment Station journal series no. R-10140. I wish to thank Luci Fisher for her technical assistance; the Solid Waste Authority of Palm Beach County, Fla., for the compost product; and Lovell Farms, Miami, Fla., for the plant

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WJ. McLaurin and G.L. Wade

In response to national Cooperative. Extension Service initiative and Georgia's Solid Waste Management Acts, eight state agencies and University of Georgia personnel joined forces to demonstrate simple and effective home composting concepts in a workshop format. Attended by over 550 participants, a series of ten workshops were held in selected locations throughout the state. These workshops were designed to instruct local volunteers to teach appropriate waste management practices concerning home composting and how home composting can help meet the state mandated 25% landfill reduction goal, what costs are involved, how to establish a community education program, and where to obtain technical assistance.

During the daylong workshop, participants heard presentations on five important aspects of the role of composting in community waste management--the legislative/environmental mandate., the composting process, equipment/site requirements, curbside waste reduction, and start-up for local programs in home composting.

As the first state-wide home composting educational project, it serves as a model for other state-wide initiatives targeting waste management concerns, and creates appropriate impetus for community waste management action throughout the state.

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Maria Papafotiou, Barbara Avajianneli, Costas Michos and Iordanis Chatzipavlidis

resource that should be preserved. A parallel environmental issue is the disposal of agricultural wastes. Composts from agricultural wastes have the potential to replace a significant proportion of peat in the growth medium of potted ornamentals ( Burger et

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Nikolaos Ntoulas, Panayiotis A. Nektarios and Efthimia Nydrioti

) have been customarily used on green roofs. Organic substances such as peat and composts have also been used but at smaller participation percentages to prevent substrate subsidizing as a result of decomposition ( Williams et al., 2010 ). As substrate

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Zhengli Zhai, David L. Ehret, Tom Forge, Tom Helmer, Wei Lin, Martine Dorais and Athanasios P. Papadopoulos

and compost products in the nursery industry, some of which could be applied to organic production settings. Amending soil or potting media with some organic wastes can improve soil physical properties with increased porosity and waterholding capacity

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Francis R. Gouin

Sewage sludge is being converted to compost by many municipalities. Its use in the production, establishment, and/or maintenance of horticultural crops is dependent on soluble salt concentration, particle size, stability, dewatering procedures, storage conditions, and crop needs. Soluble salt concentration has the greatest effect on the amount of compost that can be used as a soil or potting media amendment. Because composted sewage sludge is rich in plant nutrients, it can supply many of the nutrient needs of plants, depending on the amount used and if the plants are growing in the ground or in containers. However, improper storage of composted sewage sludge can render the product useless due to the accumulation of acetic acid and alcohol that occur under anaerobic conditions.

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S. Christopher Marble, Jeff L. Sibley, Charles H. Gilliam and H. Allen Torbert

caused elevated levels of total N in soil water in Expt. 2. However, composting PL before application could reduce N leaching. Use of CPL as fertilizer in urban landscapes could provide an environmentally sound means of disposal for poultry producers as

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James E. Altland and Charles Krause

also possible that the addition of organic substrates with high cation exchange capacity, in the form of compost, might reduce and buffer substrate pH over time. Chemical amendments can also be used to lower pH of soils and substrates. Elemental S has

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George E. Fitzpatrick, Eva C. Worden and Wagner A. Vendrame

Although composting has been practiced for thousands of years, it was not until the 20th century that controlled scientific studies were published illustrating the benefits of compost use in crop production. These studies helped to spur increased interest in composting and compost use, and gave way to the development of commercial composting facilities that supply finished compost products to horticultural producers. Increasing composting activity and compost use encouraged the formation in the late 20th century of trade organizations, such as the U.S. Composting Council and similar organizations in other countries, that support research and applications work to determine ways to improve quality control of commercial compost products.