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Nitrogen was supplied at variable rates and timing by drip irrigation to pot-grown sour cherries (Prunus cerasus) for two seasons. In the third season, the trees were planted in the field and fertigated identically. Shoot and wood growth, bud and flower development, fruit set, yield and fruit size were measured. The nitrogen content of the leaves was measured at the time of nutrient supply changes,...
Nova mandarin hybrid is prone to stylar-end fruit splitting when produced in solid, isolated blocks. In addition, self-incompatibility and weak parthenocarpy result in poor fruit set. Calcium nitrate application during flowering reduced fruit split, while girdling using a Spanish girdling tool increased fruit set dramatically. A strategy to increase export packout is presented.
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