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Jonathan R. Schultheis and Robert J. Dufault

Pretransplant nutritional conditioning (PNC) of transplants during greenhouse production may improve recovery from transplanting stress and enhance earliness and yield of watermelon [Citrullus lanatus (Thumb.) Matsum. & Nakai]. Two greenhouse experiments (Expts. 1 and 2) and field experiments in South Carolina and North Carolina (Expt. 3) were conducted to evaluate N and P PNC effects on watermelon seedling growth and their effects on fruit yield and quality. `Queen of Hearts' triploid and `Crimson Sweet' diploid watermelon seedlings were fertilized with N from calcium nitrate at 25, 75, or 225 mg·liter–1 and P from calcium phosphate at 5, 15, or 45 mg·liter–1. In the greenhouse, most variation in the shoot fresh and dry weights, leaf count, leaf area, transplant height, and root dry weight in `Queen of Hearts' and `Crimson Sweet' was attributed to N. Cultivar interacted with N, affecting all seedling growth variables, but not leaf area in Expt. 2. To a lesser extent, in Expt. 1, but not in Expt. 2, P interacted with cultivar, N, or cultivar × N and affected shoot fresh and dry weights, leaf count and leaf area. In the field, transplant shock increased linearly with N, regardless of cultivar or field location. The effect of PNC on plant growth diminished as the growing season progressed. For both cultivars at both locations, N and P PNC did not affect time to first staminate flower, fruit set, fruit width or length, soluble solids concentration, or yield. Vining at Charleston for both cultivars was 2 days earlier when N was at 75 rather than 25 mg·liter–1, without further change with the high N rate. At Clinton, the first pistillate flower was delayed linearly the higher the N rate for `Crimson Sweet'. At Charleston, hollow heart in the `Queen of Hearts' increased nearly 3 times when N PNC rate was tripled (from 75 or 225 mg·liter–1), while N had no effect on hollow heart in `Crimson Sweet'. In contrast, at Clinton, hollow heart in either cultivar was affected by P PNC, not N. PNC with 25N–5P (in mg·liter–1) can be used to reduce seedling growth and produce a more compact plant for easier handling, yet not reduce fruit quality or yield.

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Bielinski M. Santos

Foliar nutrition is an important management strategy to improve performance of vegetable and fruit crops. This technology has been used for decades to enhance nutrient absorption and utilization in three critical conditions of crops, namely: 1

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Simona Proietti, Stefano Moscatello, Fiorella Villani, Federica Mecucci, Robert P. Walker, Franco Famiani, and Alberto Battistelli

with its industrial transformation is absent. Hence, because of the growing interest in sour cherry–based products, it is essential to increase our knowledge of the genetic characteristics and nutritional and industrial quality of Prunus cerasus L

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Charles Benbrook

quality nor the weight to place on various quality parameters. We know that the nutritional quality of food for humans rests on several attributes and constituents in that food in addition to the traditional nutritional components measured (proteins, fats

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Rolland Agaba, Phinehas Tukamuhabwa, Patrick Rubaihayo, Silver Tumwegamire, Andrew Ssenyonjo, Robert O.M. Mwanga, Jean Ndirigwe, and Wolfgang J. Grüneberg

magnitudes of variance components for yield and nutritional quality traits provide information for better understanding of germplasm properties. Similarly, genotypic and phenotypic variation coefficients (GCV and PCV, respectively) give a measure of the

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Salfina S. Mampa, Martin M. Maboko, Puffy Soundy, and Dharini Sivakumar

understanding of the plant’s response to leaf harvest and N application is important in developing improved cultivation practices for increased beetroot yield and nutritional quality. Therefore, the aim of this study was to determine the effect of N application

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Sara Serra, Rachel Leisso, Luca Giordani, Lee Kalcsits, and Stefano Musacchi

Washington State. Here, the main objective was to determine the impact of different crop loads on fruit quality, storability, nutritional balance, and return of bloom in ‘Honeycrisp’ in a desert environment. Our hypothesis was that lower crop loads would

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Gerry H. Neilsen, Denise Neilsen, Peter Toivonen, and Linda Herbert

(LTB) in ‘Cox's Orange’ ( Johnson and Yogoratnam, 1978 ) and LTB and firmness of ‘McIntosh’ apples ( Webster and Lidster, 1986 ), but it is not known whether soil P applications would result in similar improvements in fruit quality. Responsiveness to P

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Christina M. Twardowski, Jaime L. Crocker, John R. Freeborn, and Holly L. Scoggins

believe the most likely impact of nutrition on rooting would be while the stock plants were growing. Our objective was to determine if manipulation of N rates as applied to stock plants would enhance the quantity of cuttings and quality of rooting for

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Nadia A. Valverdi and Lee Kalcsits

. Sci. 67 2 261 269 doi: 10.1520/D0850-11.1 Fallahi, E. 2012 Influence of rootstock and irrigation methods on water use, mineral nutrition, growth, fruit yield, and quality in ‘Gala’ apple HortTechnology 22 731 737 Fallahi, E. Colt, W.M. Fallahi, B. Chun