This investigation was carried out at the Experimentals farm of Sakha Agricultural Research Station, Kafr El-Sheikh Governorat during 2004/2005 and 2005/2006. This study was conducted to find out the effect of five plant population in terms of five planting patterns i.e. Three ridges 90 cm in width and hill spacing (15, 18 and 22.5 cm apart on the two sides of ridge) thus presents (56.000, 46.666 and 37. 333 plants/fad. respectively), row 50 cm in width and hill spacing of 20 cm apart. (42000 plant/fad.) and ridges 50 cm in width and hill spacing of 20 cm apart (42000 plant/fad.) as well as three nitrogen rates i.e. (80, 100 and 120 kg N/fad.) on yield and quality of sugar beet.Growing sugar beet plants in ridges of 50 cm and hill space of 20 cmcaused a significant increase in root diameter, root/top ratio, sucrose percentage as well as root, top and sugar yields/fad. in both seasons. On the other hand, there was no significant effect on root length, total soluble solids and juice purity percentages; parameters.Application of 120 kg N/fad. significantly increased root diameter, dry matter/plant, root/top ratio, sucrose percentage as well as root; top and sugar yields/fad. in the first season only. No significant effects were found on root length, total soluble solids (T.S.S.) and juice purity percentage in both seasons due to nitrogen fertilizer.It could be concluded that planting sugar beet on ridges 50 cm in with and hill spacing of 20 cm apart and application of nitrogen fertilizer at the rate of 120 kg N/fad. could be recommended for optimum root and sugar yields per unit area under the condition of this study.

The present investigation was carried out at Sakha Agricultural Research Station, Agricultural Research Center, Egypt during the two successive seasons 1998/99 and 1999/2000 seasons to study the response of seven sugar beet cultivars to number of foliar application with mixture of microelements. The seven cultivars were lola, Toro, Farida, Pleno, Oscar poly, Nejma and Betapoly. The mixture of the studied microelements consists of Zn, Fe, Mn, Cu, B and Mo. The plants spraied with the mixture of microelements once at 50 days from planting and twice at 50 and 65 days from planting. Cutlivars exhibited significantly differences in dry matter (g/plant), root yield, and sugar yield, in favour Toro and Farida cultivars combared with the cultivar Lola in both seasons. Foliar spraying twice with the mixture of microelements significantly increased root length and diameter, dry matter, root yield, Top yields, TSS %, sucrose percentage, sugar yield. On the other hand, repeating foliar spraying with of microelements signifiantly decreased root /top ratio in both seasons.Foliar application with the mixture of microelements twice at 50 and 65 days from planting significantly increased root length and diameter, dry matter, root and top yields/fed, TSS%, sucrose percentage and sugar yield/fed. than spraying the mixture once at 50 days from planting or with water. On the other hand, raising the number of spraying with the mixture of microelements from zero to twice decrease root/top ratio in both seasons. So, we can concluded that foliar application of the mixture of micronutrients twice, at 50 and 65 days from sowing for cultivars Toro and Farida gave the highest results from sugar root and sugar yields/fed.

Two field experiments were carried out during the two growing seasons 2005/2006 and 2006/2007 at the Experimental Farm of Sakha Agricultural Research Station North Nile Delta region, Agricultural Research Center, Egypt. The effect of three levels from N, P and K and their interaction on yield and quality of sugar beet. The most important finding could be summarized as follows: a-Nitrogen and phosphorus levels significantly affected on top, root and sugar yields/fad as well as root characters (root length and diameter as well as root weight/plant) in both seasons. increasing both nitrogen and phosphorus levels significantly increased all mentioned characters in the two seasons of study. On the other hand, potassium level failed to excert any significant effect on these traits, except root length in the two seasons. b-The obtained data reveal that increasing nitrogen level significantly decreased T.S.S% and sucrose %, but had no significant effect on purity % in both seasons. phosphorus and potassium fertilizer in significantly affected all quality characters in the two seasons. c-The interaction between or among the studied factors had no significant effect on all traits under study. It was concluded that the application of 120 kg N, 60 kg P2O5 and 48 kg K2O/fad. Could be recommended as optimum NPK fertilization treatments for higher yields and quality of sugar beet.

The present study was conducted on clay soil at Sakha Agricultural Research Station, Agricultural Research Center during 2003/2004 and 2004/2005 seasons. The aim of this investigation was to find out the optimum plant population density and the suitable time of sowing for sugar beet. A spilt-plot experimental design was used with in three replication. The main results could be summarized as follows :The results indicated that early sowing in October 10 produced the highest significant root yield, top yield, sugar yield/fad, root size, sucrose content and total soluble solids as compared with late sowing in November 25, in both seasons.Although, the yields of roots and sugar per faddan were not affected when plant population ranged from 26250 to 52500 plants per faddan, however, it decreased significantly when the plant population was recorded to 26250 and 29400 plants per faddan over the two seasons.Increasing hills spacing from 16, 20, 24, 28 to 32 cm significantly increased root diameter TSS% and significantly decreased top yield per fad. and purity percentage in both seasons. The combined results clearly showed that sowing at 16 or 20 cm hills pacing recorded highest root and sugar yield per fad.