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Timothy K. Broschat

, prevention of B deficiencies may be achieved through the use of controlled-release B fertilizers that are not greatly affected by leaching ( Page and Cooper, 1955 ). In slow-growing plants such as palms (Palmae family), chronic and recurring acute B

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T.K. Hartz and R.F. Smith

Research on the use of controlled-release fertilizers (CRF) in California vegetable production has been conducted for more than 30 years. Since Lorenz et al. (1972) evaluated CRF for potato ( Solanum tuberosum ), tomato ( Solanum lycopersicum

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Luther C. Carson, Monica Ozores-Hampton, Kelly T. Morgan and Jerry B. Sartain

Restoration Act of 1999 ( Bartnick et al., 2005 ). Controlled-release fertilizers are soluble fertilizer (SF) coated in polymer, resin, or sulfur-coated urea in a polymer coating ( Trenkel, 2010 ). Field measurements of CRF N release have been made by

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Taun Beddes and Heidi A. Kratsch

sustainable production ( Urbano, 1989 ). The use of controlled-release fertilizers (CRF) for crop fertilization has been touted as a means to reduce NO 3 -N leaching from containerized nursery crops ( Colangelo and Brand, 2001 ), and CRF is now widely used in

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P. Chris Wilson and Joseph P. Albano

Nitrogen applications are essential for producing quality ornamental plants. Nitrogen commonly is applied as nitrate (NO 3 − ) or ammonium (NH 4 + )-N in commercially available soluble and/or controlled-release fertilizer formulations. Ammonium-N is

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Kelly T. Morgan, Kent E. Cushman and Shinjiro Sato

controlled-release fertilizer (CRF; referred to collectively as S/CRF) release N, and in some cases, other fertilizer elements, at different rates and through different mechanisms ( Sartain et al., 2004 ). These release mechanisms will be discussed below

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Margaret M. Saska and Yulia A. Kuzovkina

-grown willows used for cut-stem production based on yield and timing of tip abscission and floral bud burst across five concentrations of controlled-release fertilizer. Yield data were collected on commercially important parameters: total stem length, stem

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Luther C. Carson and Monica Ozores-Hampton

ammonium (NH 4 + ) to nitrate (NO 3 − ) by bacteria or to slow the enzymatic transformation of urea to NH 4 + ( Trenkel, 1997 ). Controlled-release fertilizers, the last subgroup of EEFs, are urea, ammonium nitrate, potassium nitrate, or other soluble

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L. Carolina Medina, Thomas A. Obreza, Jerry B. Sartain and Robert E. Rouse

, including the use of controlled-release fertilizer technology, may improve N use efficiency and decrease the potential for N loss to the environment. Controlled-release fertilizer is formulated to gradually deliver nutrients to plants at a rate that matches

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Karla M. Addesso, Anthony L. Witcher and Donna C. Fare

production, this research was undertaken. The goal of this study was to evaluate swirski mite in woody ornamental container production using a controlled-release sachet method of deployment. The sachet deployment method is marketed as a way to reduce the