الفهرس 
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Abstract
This work was conducted during two winter successive seasons of 2018/2019 and 2019/2020 at Vegetable Private farm at Kafr El-Sinhab, Al-Mansoura Distract, Dakahlia Governorate, Egypt, to study the effect of some vermicompost-tea concentrations (0, 5, 10 and 20 ml/l ) and some nature botanical extracts on growth, yield and some physiological and biochemical processes of lettuce (Lactuca sativa L. cv Balady) plants under clay soil conditions with surface irrigation. Therefore, effects of soil vermicompost-tea application in combination with Rosemary leaf extract (RLE) and Eucalyptus buds extract (EBE) foliar spray on lettuce growth, yield as well as physio-biochemical properties,were investigated. The experimental design was a split plot with four concentration of vermicompost-tea (0, 5, 10 and 20 ml/l) as main-plots, three botanical extracts levels (without, RLE and EBE) as subplots, under clay soil conditions, either vermicompost-tea or plant extracts increased growth characteristics, photochemical activity, photosynthetic pigments, . relative water content (RWC), membrane stability index (MSI), excised leaf water retention (ELWR), nutrient content (i.e. N, P, K, Fe, Zn and Mn), vitamins C and E, total soluble solids (TSS) and carbohydrate fractions (i.e. total carbohydrate, reducing sugars and total sugars) in lettuce plants compared to those in the untreated control plants. The interactive vermicompost-tea (20)×RLE application was most effective to increase the abovementioned criteria. This study, therefore, recommends using the integrative vermicompost-tea (20)×RLE treatment for growing lettuce plants in sand conditions without loss in growth characteristics.