Response of some wheat cultivars to varying sowing dates and nitrogen fertilizer levels under sandy soil conditions [electronic resource].

Includes references.

Two field experiments were conducted at Abazah Village, Faqous District, Sharkia Governorate, Egypt during 2013/2014 and 2014/2015 growing seasons, to study the effect of three sowing dates (November lOth November 30th and December 20th), three nitrogen fertilizer levels (60, 90 and 120 kg N/fad.) and four wheat cultivars (Gemmizea 11, Sids 12, Giza 164 and Misr 1) on yield and yield attributes of wheat under sandy soil conditions. Each experiment included 36 treatments, which were the combinations of three sowing dates, three nitrogen fertilizer levels and four wheat cultivars. A split-split plot design with three replicates was used where; the main plots were devoted to sowing dates while the sub plots were occupied by nitrogen fertilizer levels whereas wheat cultivars were allotted in the sub-sub plots. The obtained results revealed that plant height, number of spikes /m2 ,spike length, number of spikelets/spike, number of grains/spike, 1000-grain weight as well as grain, straw and biological yields/fad., were significantly higher on November,30th sowing as compared to other sowing dates. Nitrogen fertilizer level affected significantly all studied traits. Key words: Wheat cultivars, sowing dates, nitrogen levels, sandy soil, yield and its attributes.

Summary in Arabic.

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