Tow field experiments were carried out at Mallawi Agricultural Research Station, Minia Governorate grown as plant cane in 2008/2009 and 2009/2010 seasons and the 1 st ratoon crops in 2009/2010 to investigate three harvest dates at ages of (10, 12 and 14 months) on the performance of two promising sugar cane varieties G.99-80, G.99-160 and the commercial variety G.T.54-9 as a control. A split plot design with four replications was used in both seasons. Harvest dates treatments were allocated in the main plots while sugar cane varieties were randomly distributed in the sub plots. The results showed that harvest date up to 14 months recorded the highest values of stalk height, weight kg/plant and cane yields/fed in plant cane and 1 st ratoon crops over the other two harvest dates. Sugarcane varieties differed significantly, where G.99-80 variety recorded the highest stalk height, weight kg/plant, cane and sugar yields in the plant cane and 1 st ratoon crop over the other two varieties., in respectively. G.99-160 variety surpassed G.99-80 and G.T.54-9 varieties in brix% in plant cane in both seasons and 1 st ratoon crop. G.T.54-9 surpassed in stalk diameter, sucrose% and sugar recovery%. The interaction between sugar cane variety G.99-80 and 14 months harvest date in 1 st plant cane and 1 st ratoon crop to obtain the highest cane yields. Under conditions of this work, 14 months for the plant cane and the 1 st ratoon crop of G.99-80 variety grown at Mallawi represent Middle Egypt can be recommended to obtain the highest cane and sugar yields/fed.

Two field experiments were carried out at Belkas district, El-Dakhlia Governorate during 2008/2009 and 2009/2010 seasons to evaluate quality and yields of five sugar beet varieties namely (LP11, LP12, LP13, Demapoly and Kawemira) under three harvesting dates (175, 190 and 205 days after sowing). Results can summarize as the following: 1. Delaying harvesting dates from 175 to 205 days after sowing led to significantly increases in root fresh weight, root and sugar yields/fed, as well as, significantly improved juice quality (sucrose%, Extraction sugar% and Extractability%). Moreover, impurities (K, Na and αamino N %) were significantly decreased with delaying harvest date at 205 days from sowing. 2. Results revealed the clear superiority of Kawemira variety in root fresh weight/plant, root and sugar yields/fed. waile, LP 12 and/or Demapoly varieties had the highest value for sucrose, extraction sugar and extractability percentages in one or both seasons. 3. Interaction between harvest dates x varieties had insignificant effect on all studied traits in both seasons. 4. Under the conditions of this study, Kawemira, P 12 and Demapoly varieties were the proper varieties for El-Dakhlia Governorate environment.

Two field trials were conducted during 2009/2010 and 2010/2011 seasons, in Tamia District, El-Fayoum Governorate, Egypt, to study the effect of two cease irrigation before harvest periods (10 and 20 days) and three spaces between hills (15, 20 and 25 cm) on performance of three varieties (Pleno, Samba and Lola). Cease irrigation 10 days before harvest significantly increased root and top fresh weight, while cease irrigation 20 days before harvest significantly increased sugar yield/fed, percentages of sucrose, TSS and purity. Root and sugar yield /fed, and sucrose% were significantly increased with reducing spacing hills. Spacing of 15 to 20 cm between hills had the best quality traits. Samba variety had the highest values of root and sugar yields /fed as will as sucrose and purity percentages. Ceasing irrigation and varieties interaction had a significant effect on quality traits, as well as root and sugar yields/fed. Under this study sugar beet can be cultivated on 20 cmhill spacing with cease irrigation at 20 days before harvesting to maximize sucrose% as well as yields of root and sugar yields/fed.

The major goal was to study the response of five multigerm sugar beet varieties namely; Oscar poly, Desprez poly N, Pleno, Nejma and H poly to three nitrogen fertilizer levels, i.e., 100, 120 and 140 kg N/fed.The obtained results revealed that Desprez poly N variety significantly increased in growth traits, i.e., root diameter, root fresh weight and sugar yield/fed, while Nejma variety significantly surpassed in sucrose% and root yield/fed, and reduction in impurities% in both seasons.Application of 140 kg N/fed. maximized yield productivity, represanted by improved average root weight, root and sugar yields/fed. However, juice impurities were increased as nitrogen level was increased from 100 to 140 kg/fed. On the contrary, a gradual reduction in sucrose% has been detected with the increase in nitrogen level over 120 kg/fed.The interaction between Desprez poly N variety and nitrogen fertilization up to 140 kg N/fed. recorded the highest values in root and sugar yields/fed. Under the conditions of this study productivity of sugar beet varieties could be maximize by supply sufficient nitrogen fertilization levels from 120 to 140 kg N/fed. Key words: Sugar beet genotypes, Different nitrogen levels and In newly reclaimed soils INTRODUCTIONSugar beet ranks the second sugar crop after sugar cane crop over all the world where it provides about 40% of the world sugar production. All sugar beet genotypes cultivated in Egypt are imported from foreign countries, so, it is preferable to evaluate them under Egyptian conditions especially under newly reclaimed soil to select the best suited ones. The varital differences in gen make up expression may be throw some light on their relative importance and behavior through the growing season. Osman et al (2003) showed that sugar beet Kawemira cultivar was superior in sucrose%, root, top and sugar yields/fed compared to cultivars Top, Lola, and Pleno. Aly ( 2006), Azzazy et. al. (2007) and El-Sheikh et. al. ( 2009) found significant differences among sugar beet varieties varied significantly for root fresh weight/plant, root and sugar yields/fed, while root length and diameter as well as sucrose and purity% did not differ significantly. Sugar beet variety KWS-9422 gave the highest root and sugar yields/fed. Enan et. al. (2009) revealed that sugar beet varieties differed significantly in all studied traits in both seasons. Sugar yield in the 1 st season, Farida variety gave a significant increase for sugar yield, juice quality, sucrose and purity% while it recorded the lowest values of impurities (Na, K and N%). Abd El-Aal et. al. (2010) detected significant variation in yield productivity and root quality among the varieties. Kawemira and Gloria varieties gave the

Two field experiments were carried out during 2008/2009 and 2009/2010 seasons at Kom Oshem, Fayoum Governorate to study the effect of three hill spacing, 15, 20 and 25 cm and three sugar beet varieties Pleno, Sultan and Kawemira as well as their interaction on sugar beet productivity. Sugar beet varieties were planted on 1 st November in both seasons. The obtained results revealed that: increasing plant spacing from 15 to 25 cm increased significantly root length and diameter, fresh weight, sucrose%, root and sugar yields/fed. Impurities%, i.e. (N, Na and K) were decreased significantly in both seasons. Sugar beet varieties gave increased significantly root length, diameter, fresh weight, sucrose%, root and sugar yields/fed. Decreased significantly impurities% in both seasons. The interaction was significant in both seasons for root length, fresh weight and root yields/fed. In general, sowing sugar beet at 25 cm using Kawemira variety was the best treatment for maximizing productivity under the environmental conditions of this study.

Two field experiments were conducted at Sakha, Kafer El-Sheikh, Governorate in 2009/2010 and 2010/2011 seasons to evaluate five multigerm sugar beet varieties sown at three sowing dates (1 st September, 1 st October and 1 st November). The tested sugar beet varieties were imported from Germany (Del 937 and Carolla), France (LP13), Netherlands (Samba) and Sweden (Baraca). Split plot design with four replicates was applied in both seasons. Sowing dates were arranged in the main plots and varieties in the sub plots. The results indicated that sowing sugar beet on the 1 st of October significantly surpassed the other two dates in root length, diameter and fresh weight, sucrose% as well as root and sugar yields/fed., while impurities% in roots (α-amino N, K and Na%) were increased by delaying sowing date up to the 1 st of November in both seasons. The tested sugar beet varieties differed significantly in root length, diameter and fresh weight, sucrose%, root and sugar yields/fed., and impurities% in both seasons. Carolla variety was the best one where it gave the highest root and sugar yields/fed. The interaction between the three sowing dates and five varieties had a significant effect on sucrose%, root and sugar yields. Sowing Carolla variety on the 1 st October was recommended for cultivation in Kafer EL-Sheikh as it gave the highest sucrose%, as well as sugar and root yields/fed in both seasons.