Two field trials were conducted during 1986/87 and
1987/88 seasons, at the Research and Experimental Station
of the Faculty of Agriculture at Moshtohor. Each experiment
included the treatment combinations of two wheat varieties
(Giza 157 and Sakha 8) three seeding rates (40, 60 and
80 kg/fad..) and three N levels (0, 50 and 75 kg/fad.).
Giza 157 surpassed Sakha 8 in plant height, number
of tillers/rn2, spike length and grain as well as straw
yield. The yeilds of grain and straw of Giza 157 overyielded
those of Sakha 8 by 45 and 47%, respectively.
Grain yield/fad. was not greatly influenced by seeding
rate regardless the decreases in yield components characters
which resulted from increasing seeding rates.
Nitrogen application up to 50 kg N/fad, significantly
increased studied growth characters, yield components and
grain yield..
The interaction effects, AxB on number of tillers/rn2,
number of grains/spike and weight of grains/spike, AxC
on number of tillers/rn2, spike length, number of grains/spike
and weight of grains/spike, BxC on the number of tillers/rn2
and AxBxC on number of tillers and number of spikes/rn2,
spike length, spike weight, number of grains/spike, weight
of 1000—grain and grain yield/fad, were significant and
throughly discussed.
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