during two successive growing seasons of 2018 and 2019. The study aims to assess the influence of organic food wastes (Eggshell, Banana peels, Green pea peels and Potato peels) are sources of some nutrients and Soybean protein isolate as a source of nitrogen on the soil fertility, growth parameters, yield and quality of stevia plant under drip irrigation system. The result showed positive increase in all growth parameters and yield of sativa plant as well as improving soil properties by adding organic food wastes. The most effective treatment was the combination of C 4 treatment (50% organic-N from isolated soy protein, 12.5% banana peels, 12.5% eggshell, 12.5% green pea peels and 12.5% potato peels). The highest total chlorophyll value of 4.48 and 3.61 mg/g fresh weight in the 1 st and 2 nd cutting, respectively in the 1 st season were obtained under C 4 treatment. The corresponding values were 4.89 and 4.02 mg/g fresh weight in the 2 nd season. The highest values of dry leaf yield 843 kg plot-1 and biological yield 1.60 kg plot-1 were noticed under C 2 treatment in the 2 nd cut in the first season. In the second season, the corresponding values were 1242 and 2.19 kg plot-1 resulted from C 4 treatment in the 2 nd cut. The highest values of protein content 10.73 and 13.72% in 1 st and 2 nd cut, respectively were realized under C 4 treatment in the 1 st season. The corresponding values were 15.0 and 18.11% for C 4 treatment in the 2 nd season. In the 1 st season, the highest values of stevioside content were 8.49 and 8.98 % in the 1 st and 2 nd cut for C 4 and C 2 , respectively. In the 2 nd season, the highest values of stevioside content were 9.69 and 10.05 % in the 1 st and 2 nd cut for C 2 treatments, respectively. Available N in C 0 treatment Control (without applied fertilizers) had the lowest values of both seasons compared to the C 4 treatment that had the highest values of both forms in both seasons. The overall results suggest that organic food wastes combination could be advised to grow stevia plant and improving soil properties of Egypt.

L.) plant. A study was initiated through various biostimulant and chemical fertilizer aiming to evaluate effectiveness of arbuscular mycorrhiza fungi (AMF) or seaweed extract and/or humic acid as well as chemical fertilizer (N.P and K) and the combination of them on vegetative growth, seed yield, chemical constituent's, fixed oil productivity and fixed oil composition of chia (Salvia hispanica L.) plant. Plants sprayed by biostimulants gave the significantly highest mean values for all of studied characteristics mentioned above, particularly T6: the combined of mycorrhiza, humic acid, seaweed and recommended dose of NPK followed by T5: recommended dose of NPK (350:200:100 kg/feddan) in the first and second seasons. Meanwhile, T4: seaweed (1 ml/l) ranked the third values in parameters mentioned before in this concern. Whereas, the richest fixed oil percentage was scored by T6, followed descendingly by T5 in the 1 st and 2 nd seasons. Chromatography analysis of chia fixed oil revealed the identification of four components. i.e. palmitic acid, oleic acid, linoleic acid and αlinolenic acid. The main component was α-linolenic acid (43.34 to 53.28%). It can be concluded that T6 was the best for improving growth, seed yield, fixed oil productivity, chemical constituents and fixed oil components of Salvia hispanica L. plant.