الفهرس 
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Abstract
Barley is one of the most important cereal crops that grown in Egypt. Barley is well known as a tolerant crop to the harsh conditions such as, heat, salinity, drought and poor soils. Barley grown has been, therefore moved to the rainfed areas in the Northen coast and the newly reclaimed lands such as ; Northen Delta, Noubaria and Ismailia. This investigation is aimed to evaluate six (two rowed) barley cultivars i.e. Bweet, Giza 128, Derkado, Sharm, Kanesta and Marsi, under three seeding rates i.e. 30, 45 and 60 kg/fed. And three nitrogen fertilizer levels i.e. 30, Kafr El-Sheikh, Ismailia and El-Beheira governorates. The interaction between characters were studied through simple correlation, multiple linear regression and stepwise regression.
Four experiments in each season were conducted at four locations i.e. El-Gemmeiza, Ismailia, Sakha and Noubaria experimental stations during 1997/98 and 1998/99 seasons. Split-split plot design with three replicates was used. Each experiment included three seeding rates distributed at random in the main plot, three nitrogen fertilizer levels allocated randomly in the sub plots. The plot area of the experiment unit was 10.5m2 (15 rows, 20cm apart and 3.5m long).
Studies characters :
A. Earliness characters : number of days to 50% heading and number of days to maturity.
B. Growth characters : flag leaf area (c m2) and plant height (cm)
C. Yield components : number of spikes/m2, spike length (cm), number of grains/spike, grain weight/spike (gm), and 1000 grain weight (gm).