Abstract
Foliar application with urea at 1.5% or 3.0% foliar urea in mid-December and/or mid-January to Valencia orange trees budded on Volkameriana rootstock, increased the number of flowers/branch, fruit set/branch and number of fruits/tree.The data also reveal that average of fruit weight, length and yield of trees which sprayed in mid-January with 1.5% urea solution was higher than the control but Friut diameter was affected, only in the second season, by different urea treatments. Juice volume per fruit also showed an increase for most urea treatments. SSc, total acidity and Vit. C were also affected by urea applications leaf nitrogen and ammonium contents were also increased as a result of sprayed trees with winter urea.
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