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A randomized complete block design 3X5 experiment was designed and conducted to characterize the relationships between three soil moisture levels (W1=8 5 % depletion of the available soil water, W2=55% depletion of the available soil water and W3= 25% depletion of the available soil water) and five Vesicular-Arbuscular Mycorrhizal (VAM) fungi treatments which were (control = without AMF and zero phosphorus, P0=zero phosphorus + AMF, P1= 25% recommended phosphorus + AMF, P2= 50% recommended phosphorus + AMF and P3= 100% recommended phosphorus + AMF) on morphological characteristics, yield and its components, photosynthetic pigments concentrations and oil % content. The maximum significant records for growth characters, yield components, oil % and carotenoids concentrations were obtained in plants grown under the highest soil moisture level W3 inoculated with arbuscular mycorrhiza fungi and treated with the highest phosphorus level P3, Followed mostly by the same treatments under the moderate soil moisture level. From this study, it was observed also that the highest chlorophylls content and the highest main root length were drowning under the highest water stress level inoculated with AM fungi and treated with the highest phosphorus level.
[Soha E. Khalil and Rabie M.M. Yousef (2014); Interaction Effects of Different Soil Moisture levels, Arbuscular Mycorrhizal Fungi and Three Phosphate Levels on: I- Growth, Yield and Photosynthetic Activity of Garden Cress (Lepidium sativum L.) plant. Int. J. of Adv. Res. 2 (6). 0] (ISSN 2320-5407). www.journalijar.com
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