Effect of winter spraying of urea on Valencia orange Treesscript title already exists

الملخص EN

This study was carried out during 2018/2019 and 2019/ 2020 seasons to examine the effect of urea winter spraying at 2.0% and 3.0% on initial fruit setting, yield and fruit quality of Valencia orange trees grown under Minia climatic conditions.

Spraying was carried out once at first of November, twice at first and mid of November or thrice at first, mid and last of November.

Increasing in urea concentrations and frequencies were of promotion effect on fruit set and the yield as well as the physical and chemical properties of the fruits.

Spraying urea at 3.0% was more effective than spraying it at 2.0% on the yield and the quality of valencia orange trees.

The difference between spraying it at 2.0% and 3.0% was statistically of significant on all of the properties of valencia orange trees.

The best results were obtained by spraying valencia orange trees with urea at 3.0% thrice annually at first, mid and last of November.