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Huihui Zhang, Ping Yu, Min Song, Dalu Li, Qianqian Sheng, Fuliang Cao, and Zunling Zhu

, continuous observation of the dynamic changes in leaf photosynthesis in G. biloba throughout the growth period has not been reported. For the present study, five late-deciduous superior G. biloba cultivars were selected by our research team over the

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Shawn A. Mehlenbacher and Anna M. Voordeckers

The relationship between dormancy of seeds and buds of apple (Malus × domestica Borkh.) might provide breeders with an early opportunity to select for delayed development. Seeds of late-flowering genotypes require much longer exposure to chilling temperatures than those of early flowering” genotypes, and they germinate over a much longer period. In three progenies that exhibit much variation for the two traits, seed germination time was correlated with time of leafing-out of the resulting seedlings, and could be used to select for delayed budbreak. However, selection would be ineffective when little genetic variation for seed germination and budbreak is present. Leafing-out ratings in the nursery in the 2nd year were highly correlated with those in the 3rd year, indicating that selection for late leafing in the nursery during the 2nd year would be more effective than selection based on seed dormancy, especially in progenies exhibiting little genetic variability for this trait. Breeders can effectively use both relationships by first eliminating early germinating seeds and then eliminating early leafing seedlings.

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Bernadine C. Strik and Amanda J. Vance

; Bushway et al., 2008 ; Fernandez and Ballington, 1999 ; Hart et al., 2006 ; Krewer et al., 1999 ). In floricane-fruiting blackberry and raspberry, leaf sampling of primocanes in mid to late-season informs growers of plant nutrient requirements for fruit

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Michael V. Mickelbart

( Snyder and Struve, 1997 ). The goal of this study was to determine the differences in leaf characteristics and nutrient concentrations resulting from position (north, south, east, and west directions) and age (early-season versus late-season leaves

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M. Lenny Wells

literature regarding the fate of flowers developing from secondary buds after a late spring freeze or on season-long response of the tree to freeze-induced stress. This study reports the effects of a late spring freeze on flowering, shoot growth, leaf

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Bernadine C. Strik and Amanda J. Vance

sample dates at the conventional site ( Fig. 4 ), but not at the organic site ( Fig. 5 ). ‘Liberty’ had the highest leaf N throughout much of the season at the conventional site. Leaf N leveled off in the late July to mid-August period, regardless of

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Clinton C. Shock, Erik B.G. Feibert, and Lamont D. Saunders

were stressed only once during the season. The five growth stages for the stress treatments were two-leaf (2004 and 2005 only), four-leaf, early six-leaf, late six-leaf, and eight-leaf. Onion growth stages were determined by counting the number of

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Dennis R. Decoteau

after 22 d (early sampling) in the mulch treatment and the remaining two plants were sacrificed for sampling after 50 d (late sampling) in the mulch treatment. Leaf area, as measured with an area meter (model 3100; LI-COR Biosciences, Lincoln, NE), was

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Youngsuk Lee, Hun Joong Kweon, Moo-Yong Park, and Dongyong Lee

points from late May to late August. To minimize variability among leaves, we measured a uniform leaf section of all leaves used for the experiment. The middle leaf section between the top and bottom adaxial sides was selected from the third to the

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Seong-Tae Choi, Doo-Sang Park, Seong-Mo Kang, and Soo-Jeong Park

The N status of persimmon trees is usually appraised by N concentration determined from midshoot leaves of late July to mid-August. Laboratory determination for leaf N concentration is time-consuming, and the results of such analyses are mostly used