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Kelly T. Morgan, T.A. Obreza, and J.M.S. Scholberg

nutrient uptake efficiency, and reduce leaching below the root zone. Several Florida studies showed that tree size and yield were related to fibrous root dry weight density or distribution in the deep sandy soils of central Florida ( Castle and Krezdorn

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Gabino H. Reginato, Víctor García de Cortázar, and Terence L. Robinson

( Byers et al., 2005 ; Marini, 2000 ; Stover et al., 2001 ). Several approaches have been used to measure crop load, including fruit number normalized by tree size based on trunk cross-sectional area (TCA; cm 2 ), tree size based on canopy volume (m 3

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D.M. Glenn, T. Tworkoski, R. Scorza, and S.S. Miller

The lack of dwarfing rootstocks for peach ( Bassi et al., 1994 ; Grossman and DeJong, 1998 ) has led to cultural approaches that reduce tree size and vegetative growth to establish high-density plantings. Water management through irrigation

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Michael W. Smith and Charles T. Rohla

are reported from selected producers. Observations Ice accretion. Observations and producer reports indicated that the degree of damage to pecan was proportional to the amount of ice that accumulated on the trees, the cultivar, and tree size. There was

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C.G. Embree, B.H. Lesser, and A.D. Crowe

The 30 apple (Malus domestica Borkh.) rootstock candidates selected for cold hardiness, known as the Kentville Stock Clone (KSC), with `McIntosh' and `Delicious' as scion cultivars, were compared at 11 years of age for tree size, weight, fruit yield, and crop efficiency under field conditions. Trunk cross-section area and tree weight were highly correlated. Tree size was similar for the two cultivars in most cases and ranged in size from semidwarf to very vigorous. Cumulative yield efficiencies varied by nearly two-fold and were not correlated with tree size. The most efficient rootstocks were KSC 28, KSC 7, and KSC 6 in the semidwarf, semivigorous, and vigorous size classifications, respectively.

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Daniel C. Milbocker

Trees grown entirely in containers have slim trunks. Since large tree sizes are measured interms of their trunk diameter, heavier trunks increase salable tree sizes. River Birch, Betula nigra liners were grown in containers that were increased in size at different rates determined by their trunk diameter. These measurements revealed the minimum container size necessary for unconstricted growth and measured the reduction in trunk diameter induced by smaller container sizes.

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Thomas A. Obreza, Robert E. Rouse, and Kelly T. Morgan

evaluated using linear regression ( Systat Software, Inc., 2006 ). Phosphorus soil test calibration was attempted by relating tree size, fruit yield, leaf tissue P concentration, and fruit quality variables measured from each plot in a given year to soil

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Kelly T. Morgan, T. Adair Wheaton, William S. Castle, and Laurence R. Parsons

and canopy volume in 2 of 3 years ( Table 2 ). Method of nutrient application also influenced tree size and yield, but the effects changed with time. At the higher N rates, yield and tree size for the DGF method were considerably lower than for the

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Gennaro Fazio, Yizhen Wan, Dariusz Kviklys, Leticia Romero, Richard Adams, David Strickland, and Terence Robinson

effects and the interaction ( Dw1 × Dw2 ) using the generalized linear models procedure in Statistica 9. Results Trait correlation. The overall Pearson correlation coefficient in tree size between the rootstock mother plants and derived 3-year

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James R. Schupp, H. Edwin Winzeler, Thomas M. Kon, Richard P. Marini, Tara A. Baugher, Lynn F. Kime, and Melanie A. Schupp

movement of air and sprays of protective chemicals, keep tree size within desirable limits, and manipulate the natural balance between vegetative and reproductive structures ( Ferree and Schupp, 2003 ; Fumey et al., 2011 ; Jonkers, 1982 ). Pruning has