الفهرس 
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Abstract
Two field experiments were conducted out at farm, Nubaria, El- Behira Governorate, Egypt, during the two summer seasons of 2019 and 2020 to study the effect of foliar application of salicylic acid (SA) and ascorbic acid (ASA) concentrations to reduce the salt stress effect in the soybean cultivar (Giza 111) under drip irrigation using yield measurement to determine the best salicylic acid (SA) and ASA concentrations could be used to maximized seed yield and seed quality under salt stress conditions.
This experiment was allocated as factorial experiment in randomized complete block design (RCBD) with three replications in both seasons. The first factor was salicylic acid (SA) concentration (water = control, 500, 1000 and 1500 ppm), while the second factor was the rates of ascorbic acid (ASA) concentration (water = control, 500, 1000 and 1500 ppm) was in both seasons.
The obtained result could be summarized as follow:
- Plant height (cm), and maturity dates (days), of soybean were significantly affected by foliar application of salicylic acid (SA) and ascorbic acid (ASA) in 2019 and 2020 seasons.
- Increasing SA concentration increased plant height (cm), and reduced maturity dates (days) of soybean, where the highest mean values of plant height (cm) were recorded with foliar application of SA up to 1500 ppm which gave the lowest values of maturity dates (days), followed by 1000 ppm from SA, while the lowest values of plant height of soybean were given with spray water (control) in the first and second seasons.
- Increasing ascorbic acid (ASA) concentration up to 1500 ppm significantly increased plant height (cm) in comparison with the control treatment. The higher concentration of ASA reduced the maturity dates (days).
- The interaction between salicylic acid (SA) and ASA was significant on this trait, In this respect, the highest mean values of plant height were recorded with foliar application of 1500 ppm SA + 1000 ppm ASA, on the other hand the lowest maturity dates gave with 1500 ppm from SA and ASA in both seasons.
- Number of branches/plant, number of pods/plant, and 100- seed weight of soybean were significantly affected by foliar application of salicylic acid (SA) and ascorbic acid (ASA) in 2019 and 2020 seasons.
- SA application increased number of pods/plant, 100- seed weight (g) and reduced maturity dates (days), where the highest values of number of pods/plant, 100- seed weight (g) recorded with foliar application of SA up to 1500 ppm followed by 1000 ppm from SA, meanwhile the lowest values of number of pods/plant, and 100- seed weight (g) of soybean were given with spray water in the first and second seasons.