الفهرس 
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Abstract
Field experiments were carried out in two successive seasons during the winter seasons of 2015/2016 under natural conditions in Faculty of Science,Mansura University at Dakahlia Governorate, Egypt. The aim of this study is to improve the yield quantity and quality of the Pea(Pisum sativum L.) plants. The experiment included 80 treatments resulted from combination of Trichoderma harzianum fungi and Trichoderma viride and Saccaromyces yeast versus control treatments ( were arranged in sub plots. The treatments were arranged in a randomized complete blocks design with four replicates. According to the obtained results in this investigation, the treatment Trichoderma harzianum mixed with commertial compost was the best treatment that could be recommended to obtain the highest yield as well as improve seed quality and quantity , especially TSS% and vitamin C of Pisum sativum seeds in north delta area and other regions with similar climate conditions.