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Valérie Gravel, Claudine Ménard, and Martine Dorais

( Gauthier et al., 1998 ). Gladstone and Moorman (1990) demonstrated that losses resulting from Pythium root rot affecting geranium plants are greater when high nitrogen fertilization rates were used. In the case of this experiment, similar nitrogen

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Tongyin Li, Guihong Bi, Richard L. Harkess, Geoffrey C. Denny, Eugene K. Blythe, and Xiaojie Zhao

). In another study, increasing N fertilization rate was found to promote shoot growth of Rhododendron ‘Karen’, with decreasing N and phosphorus (P) fertilization rates promoting root growth ( Ristvey et al., 2007 ). Optimal plant growth was maintained

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Monte L. Nesbitt, Robert C. Ebel, and William A. Dozier Jr

other traits, is highly desirable. Nitrogen fertilization and peel thickness in citrus are generally believed to be positively correlated ( Zekri et al., 2003 ), and growers in Alabama tend toward low to moderate nitrogen fertilization rates. Under

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Nadia Jiménez-Peña, Luis A. Valdez-Aguilar, Ana M. Castillo-González, María T. Colinas-León, Andrew D. Cartmill, and Donita L. Cartmill

results demonstrate that L. anceps responded to fertilization rate, because the nutrient solution of –0.076 MPa resulted in the highest leaf DM. Thus, the nutrient concentration of solutions at –0.051 MPa was not sufficient to maintain growth of Laelia

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Margaret M. Saska and Yulia A. Kuzovkina

fertilization rates on field plantings of giant pussy willow ( S. chaenomeloides ) and found no significant effect on stem quantity or length at N concentrations of 0.25, 0.5, 1, or 2 oz/plant (20–150 lb/acre N) within 1 year of harvest ( Bir and Conner, 2006

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Timothy K. Broschat

fertilization rates in japanese ligustrum ( Ligustrum japonicum ). Gilman et al. (2000) also did not observe differences among treatments in the growth of southern magnolia ( Magnolia grandiflora ) during the first year after planting, but treatment

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Timothy K. Hartz and Thomas G. Bottoms

. de C. Carmello and Anti (2006 ; Brazil) and Vazquez et al., (2006 ; Spain) also reported seasonal N uptake exceeding 400 kg·ha −1 . Such high N uptake suggests that significantly higher N fertilization rates might be required under some field

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David Sotomayor-Ramírez, Miguel Oliveras-Berrocales, and Linda Wessel-Beaver

) over a 5-year period in Mollisols using fertilization rates ranging from 0 to 224 kg·ha −1 of N. When processing pumpkin following soybean ( Glycine max ), the optimal N fertilization rate was 110 kg·ha −1 . Harrelson et al. (2008) found that

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Sueyde F. de Oliveira, Paul R. Fisher, Jinsheng Huang, and Simone da C. Mello

-coated controlled-release fertilizer (CRF); DCT = 14N–3.5P–9.1K double-coated CRF; OSM + DCT = blend of 15N–3.9P–10.0K single- and double-coated CRF; WSF = 15N–2.2P–12.5K WSF; Low = low fertilization rate, High = high fertilization rate. Nutrient levels during the

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Rhuanito Soranz Ferrarezi, Geoffrey Matthew Weaver, Marc W. van Iersel, and Roberto Testezlaf

treatments, and this effect was attributed to increased fertilization rate due to the absence of leaching. Subirrigation reduced the puncture strength of manure, paper, and wood fiber biocontainers, but not peat biocontainers. Water conservation Subirrigation