الفهرس 
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Abstract
This study was carried out during the two successive seasons of both 2016 and 2017 on six years old ’Wonderful’ pomegranate trees (Punica granatum L.). Trees were planted in sandy loam soil conditions in a private orchard located at Burg El-Arab, Alexandria, governorate, Egypt.
The trees were spaced at 4x5 m apart and irrigated by drip irrigation system and received similar cultural practices adapted in the orchard. The present investigation aimed at study the effect of some growth regulators, nutrient elements and kaolin on cracking and fruit quality of ’Wonderful’ Pomegranate tress. Fifty five trees were selected uniform as possible in growth, productivity and appearance for this study. This experiment consisted of eleven treatments arranged in a Randomized Complete Block Design (RCBD) with five replicates for each treatment and one tree for each replicat.
The treatments were as follows:
1) Control (Spraying with water).
2) 25 mg/l Naphthalene acetic acid (NAA).
3) 50 mg/l Naphthalene acetic acid (NAA).
4) 100 mg/l Gibberellic acid (GA3).
5) 150 mg/l Gibberellic acid (GA3).
6) 0.1% Boric acid (17% B).
7) 0.3% Boric acid (17% B).
8) 1% Calcium chloride (34% Ca).
9) 2% Calcium chloride (34% Ca).
10) 4% Kaolin.
11) 6% KaolinThe result of this experiment could be summarized as follows:
1. The extent of shoot length was highest in GA3 at 150 mg/l, while, the lowest shoot length was recorded by control, during both seasons, respectively. The maximum shoot thickness
was recorded with 50 mg/l NAA in the first season and with 150 mg/l of GA3 in the second season, respectively, while, the lowest shoot thickness was recorded with untreated treatment (control), in both seasons. The treatment of GA3 at 150 mg/l recorded a significant increase in leaf area of pomegranate trees in the first season and 50 mg/l NAA in the second season, respectively, as compared with untreated treatment which recorded a significant decrease in leaf area in 2016 and 2017 seasons, respectively.
2. The maximum fruit set was recorded by foliar application of 0.3% boric acid during both seasons 2016 and 2017, respectively. The minimum fruit set was observed in untreated treatment (control) in 2016 and 2017 season.
3. Control treatment recorded significantly higher percent fruit DROP (%), while, the lower percent of fruit DROP was observed in 50 mg/l NAA, respectively, during both seasons.
4. The maximum sunburn and fruit cracking were observed by control treatment, in both the
years. The minimum sunburn recorded by treatment 6% Kaolin, in the first and second seasons, respectively.