Two field experiments were conducted at Wadi El-Natrun, El-Bahira Governorate, (latitude of 30.48 0 N and longitude of 30.50 0 E) in 2015/2016 and 2016/2017 seasons to study the effect of potassium humate and nitrogen fertilization and its impact on yield and quality of sugar beet sown in a sandy soil. The present work included twelve treatments, which were the combination of four potassium humate levels as soil additives (without, 4, 8 and 12 liter /fed) and three nitrogen rates (80, 100 and 120 kg N/fed). the treatments were arranged In strip plot design with four replicates. Potassium humate levels were occupied the vertical plots, while nitrogen rates were represented in horizontal plots. Results show that soil application of 8 and/or 12 l potassium humate/fed significantly exhibited higher values of leaf area index (LAI), root diameter, root and foliage fresh weight/plant, sucrose%, and quality index as well as extractable sugar%, root and sugar yields/fed in both seasons. Moreover, root potassium, sodium, α-amino N contents, alkalinity coefficient and sugar lost to molasses% were insignificantly affected by the studied potassium humate levels.Increasing nitrogen fertilizer from 80 up to 120 kg/fed positively enhanced LAI, root diameter, root and foliage fresh weights/plant in both seasons. Whilst, the highest sucrose, extractable sugar percentages, sugar and root yields/fed, quality index and alkalinity coefficient were obtained by the application of 100 kg N/fed. On the other hand, higher values of sugar lost to molasses% and non-sucrose components (K, Na and αamino -N) were detected in beets fertilized with 120 kg N/fed. Based, under conditions of the present work, application of 8 1/fed potassium humate and fertilized with 100 kg N/fed could recommend obtaining the highest root and sugar yields/fed.

The aim of this research is to assess the effect of foliar spraying with boron and methanol levels and time of methanol application. Two field experiments were conducted at EL-Haamoul district Kafer EL-Sheikh Governorate, Egypt during 2012/2013 and 2013/2014 seasons. Strip-plot design was used in both seasons. Main plot (vertical) allocated with Boron levels (0, 1 and 1.5 Kg/fed.) sub plot (horizontal plots) takes Methanol rates (15%, 30% and 45% v/v) this solution were sprayed overhead 3 times in two weeks intervals starting after 55 and repeated at 70 and 80 days from sowing with (zero, one, two and three times) were distributed in sub-sub plots. Obtained results indicated that addition boron on foliage as foliar spraying at rate of 1.5 Kg/fed. Significantly increased affected on the values of most characters under study i.e. root dimension, yields of root, top and sugar per fed. In additions to impurities (Na, K and α-N) and quality traits as sucrose and sugar losses percentages. On the other hand purity and extractability percentage gave the highest values with control treatments. This was true in both seasons. Application of methanol solution at level 45% take the mentioned trend of boron and gave the highest values 45% compared with level 15% which recorded the lowest values with purity and extractability percentages. Times of foliar applications of methanol on sugar beet leaves at three times recorded the highest values for most traits as boron and methanol levels except impurities content (Na, K, α-N). alkalinity, purity, extractability% which recorded in significant effect on values of these traits in both seasons. Whereas, sugar losses% showed significant increase in the second season only, sugar extractable% and sugar yield (ton/fed.). Significant interaction effects were found between factors under study on some traits in both seasons.

To investigate the effect of nitrogen and yeast rate, as well as number of magnesium application on sugar beet yield and quality, two field experiments were carried out at the Experimental Farm of Sakha Agric. Res. Station, KaferEL-Sheik Governorate, Egypt, during the two successive seasons of 2013/2014 and 2014/2015. Split-split plot design was used in both growing seasons. Three nitrogen rates (75, 85 and 95 kg N/fad) were arrange in main plots, two yeast rates (10, 15 g/l) were devoted in sub-plots, whereas, sub-sub plots were allocated to number of magnesium applications at rate of 6 g/l (without addition, one, two and three times). Main results could be summarized as follows: Increasing nitrogen rates from 75 to 95 kg N/fad significantly increased the most characters under study such as, root dimensions, top/ root ratio, in the second seasons sugar beet yields (top, root and sugar), impurities values as well as sugar loss in molasses and alkaline coefficient in term (AC). On the other direction, juice quality significantly decreased such as sucrose%, extractable sugar, extractability and purity percentages as nitrogen level increased. Application of yeast at the rate of 15 g/l significantly affected yield and quality and caused a significant increase in the most characters under study as compared to the rate 10 g/l which gave lowest values for all traits under studied trails. Application of study take the same trend of nitrogen fertilizer effect. Number of magnesium application as foliar spray at the rate of 6g/l significantly affected the most studied characters. Three times, significantly increased sugar beet yield and its attributes, while it significantly decreased quality values for some traits as sucrose%, extractable sugar and extractability percentages. It could be concluded that adding nitrogen fertilizer at the rate of 95 Kg N/fad and yeast at the concentration of 15g/l as well as application of magnesium three times at the rate of 6g/l is a recommended treatment for maximizing sugar beet yield and its quality under these conditions of this study.