Two field experiments were carried out in salinity soils at Tag EI-Eiz,
Agricultural Research Station, Dakahlia Governorate, Egypt, during the two
successive growing seasons 2000 and 2001. This investigation aimed to study the
effect of time of foliar application of urea 20% (at panicle, at panicle+1 0 days and at
panicle+ 20 days) on yield and seed quality of some rice varieties (Giza 177, Giza178
and Sakha 101) in salinity soils conditions. The results indicated that rice variety Giza
178 gave the highest value of panicle length, no. of panlcles/m'', panicle weight, no.
and weight of grains/panicle, germination percentage and plumule length(cm) in the
first season and no. of panicles/rrr', no. of grains/panicle, grain yield and germination
percentage in the second season. While Sakha 101 gave the highest value of 1000-
grain weight, grain yield, protein percentage, root length and seedling dry weight in
the first season and plant height, panicle length and weight, grain weighUpanicle,
1000-grain weight, straw yield, germination percentage, plumule length and seedling
dry weight in the second season. On the other hand, Giza 177 gave the lowest value
in all characters except carbohydrate percentage and seedling dry weight in the first
season and carbohydrate percentage and plumule length in the second one. Foliar
application of urea at panicle gave the highest value of grain yield, germination
percentage and seedling dry weight in both seasons. The interaction between rice
varieties x application time of urea spraying 20 % was not significant in all characters
except of grain weighUpanicle, straw yield and carbohydrate percentage in the first season.