Two field experiments were carried out during the seasons of 2003 and 2004 at El-Bostan area, Nubaria region. The aim 0‘ the study was to investigate the effect of foliar application of yeast extract. urea at two rates (0.5 and 0.75 “/0 urea) and their combinations on yield and quality characters of Thompson seedless grapes (Vr'ris vinifer; L). Foliar application by yeast o'cract or urea (0.5 0A) significantly increased the yield. density of berries per bunch, bunch and berry dimensions, weights of bunch and berry, as well as T88 and TSS/acidrty ratio, while the fruit acidity significantly cecreased. Foliar application with yeast extract significantly increased N content or leaves from 0.9 “/3 (untreated plants) to 2,0 %, as well as N content of leaves significantly increased from 0.9 % {untreated plants) to 3.4 9'0 or 3.6 0,3 by folrar application wrth 0.5 “it or 0.75 “it urea, respectively. However, foliar application with yeast extract in combination with urea (0.5 % or 0.75 Cfol was significantly decreased N content of leaves. as compared with urea foliar application alone Also, lollar application wrth yeast extract, urea or in combination of both, significantly increased P and. K contents of leaves as compared with untreated plants.