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Gioia D. Massa, Hyeon-Hye Kim, Raymond M. Wheeler, and Cary A. Mitchell

radiation capture may need to be reported to take into account parameters such as canopy volume or total energy use/cost. An important issue for LEDs in horticulture concerns their economic viability. Like with any developing technology, as demand

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David L. Ehret, Brenda Frey, Tom Forge, Tom Helmer, and David R. Bryla

treatments, respectively ( P > 0.05). An increase in plant height and width implies greater canopy volume and possible leaf nutrient dilution with irrigation as discussed previously. Additionally, plant height was greater in the highly irrigated compared

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Gerry Henry Neilsen, Denise Neilsen, and Linda Herbert

also a general trend to increase per-tree water application over time because the tree canopy volume and crop coefficient used to express this change also increased over time. Because N treatments were defined by maintaining a constant low (28 mg·L −1

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P. Gordon Braun, Keith D. Fuller, Kenneth McRae, and Sherry A.E. Fillmore

1397 1411 Wright, H. Nichols, D. Embree, C. 2006 Evaluating the accountability of trunk size and canopy volume models for determining apple tree production potential across diverse management regimes Acta Hort. 707 237 243 Yao, S. Merwin, I.A. Abawi, G

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Gerry Neilsen, Frank Kappel, and Denise Neilsen

concentrations, broadcast N application rate would have to be increased above 75 kg N ha as trees age and canopy volume increases. Trees receiving drip relative to sprinkler-fertigated N could have relatively higher (2003) or lower (2005) leaf P concentrations

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Richard P. Marini, James R. Schupp, Tara Auxt Baugher, and Robert Crassweller

minimum, mean, and maximum FWH plus standard deviations for each tree are presented in Table 1 . Previously, we found that sampling all the fruit from a vertical wedge of canopy representing ≈12.5% of the canopy volume provided a distribution of fruit

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John D. Lea-Cox, William L. Bauerle, Marc W. van Iersel, George F. Kantor, Taryn L. Bauerle, Erik Lichtenberg, Dennis M. King, and Lauren Crawford

-point (threshold) control for automating irrigation decisions with a model-based approach that estimates plant water use through measurements of transpiring leaf surface area, canopy volume, and physiological leaf parameters, combined with real-time environmental

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Todd C. Einhorn, Mateus S. Pasa, and Janet Turner

trees. Trees were selected for uniformity of size (canopy volume) and then grouped within blocks based on trunk circumference. Solutions (ppm of active ingredient) of P-Ca and/or ethephon [Ethrel ® ; Bayer Crop-Science, Research Triangle Park, NC] were

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

( Malus domestica ) than low irrigation frequency, with less effect on leaf nutrient concentration. Canopy volume, trunk cross-sectional area, dry weight, shoot length, leaf area, and total root dry weight of young ‘Hamlin’ orange ( Citrus sinensis ) trees

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Kelly T. Morgan, Lincoln Zotarelli, and Michael D. Dukes

application rates of reclaimed water ( Parsons et al., 2001 ). In research plantings, very high rates of up to 2540 mm per year were applied to two citrus cultivars on four rootstocks. Application of 2540 mm of reclaimed water significantly increased canopy