الفهرس 
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Abstract
two pot trials were carried out at the Experimental Farm, Faculty of Agriculture, Damietta University, Egypt over two successive winter seasons, i.e., 2018/2019 & 2019/2020. The goal of this research includes investigating the potential effects of three plant extracts on the morphological, anatomical and chemical composition, grain yield, characteristics and quality.. The experiment included the following treatments in each growing season:
1) Control (treatment of distilled water)
2) LRE at a concentration of 2.5 g l-1.
3) LRE at a concentration of 5 g l-1.
4) MLE at a concentration of 5 g l-1.
5) MLE at a concentration of 10 g l-1.
6) OLE at a concentration of 10 g l-1.
7) OLE at a concentration of 20 g l-1.
All previous treatments were used as soaking materials for grains for 8 hours immediately before planting then as foliar spray on the growing plants on the 45th DAP. In plastic pots (30 cm in diameter) filled with silt and sand combination (1: 1 v/v), the pre-planting treated grains were sown on the 20th of November for the 2018/19 and 2019/20 seasons (24 pots / treatment and 3 grains / pot). At 21 DAP; emerged seedlings were thinned to one per pot. A randomized complete block design with four replicates (6 pots per replicate) was used to perform the experiment. In both seasons, irrigation with tap water and other farming services of cultivated wheat were done as recommended.
The obtained results showed that the growth and productivity of the wheat plant were significantly enhanced by the three applied extracts during the two growing seasons. The most important treatments used were the treatment of olive leaf extract with a concentration of 20gl-1
the current study confidently recommends expanding the use of such natural extracts as organic growth enhancers or biostimulants not only for wheat but also for all food crops to achieve the highest yield in terms of crop quantity and sanitary quality characteristics.