RESPONSE OF FIVE   SYNTHETC  VARIATES 0F CORN TO PLANTING DATES.

	RESPONSE OF FIVE SYNTHETC VARIATES 0F CORN TO PLANTING DATES.
Euphrates Journal of Agriculture Science
Article 1, Volume 5, Issue 2, 2013, Pages 138-149
Abstract
ABSTRACT : This experiment was conducted during the fall season of 2011 and spring season of 2012 in a field in Sadat AL-Hendia , 25 Km at the East North of Babylon , to study the response 0f five synthetic varieties (5018 , 5012 , Rabea , Bohooth 106 and Maha) of corn to planting date ( 10July , 25July and 10August.) as well as (1March ,10 March, 20March ) in the fall season of 2011 and spring season 0f 2012 respectivaly in a split plot in RCBD with three replications ,the main plots were the genotypes while planting times represent the sub-plot .Result can be summarized . A significant differences was observed among genotypes for the fall season, Bohooth 106 gave the No raw /ear ( 16.85) ,total grain yield (9.34)ton /ha . while for the spring season it is also noted that same genotype resulted in, raw No/ear (17.14), seed No./ear (634.25), total grain yield (7.88)ton/ha , and harvest index (43.68)%. As for the planting time , the plants planted on 25 July took , this date , however , gave higher raw No./ear(16.98) , seed No.(630.57) grain yield (9.85)ton/ha and harvest index reached (46.99)% for fall season, seed No.(611.50), grain yield (8.30)ton/ha , harvest index (43.09) .The interaction of Bohooth 106 planted at 25 th July gave the highest means of grain yield (10.90)ton/ha for the fall season , while in the spring season , the interaction between bohooth 106 with planting in1st March gave higher yield reached (9.07) ton/ha .

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