In order to study the effect of foliar spraying times and levels of yeast extract and boron on productivity and quality of sugar beet cv. Hossam, a field experiment was carried out at Kalabsho Experimental Farm (sandy soil), Dakahlia Governorate, Sugar Crops Research Institute, Agricultural Research Center, Egypt, in two successive seasons of 2014/2015 and 2015/2016. Two experiment trails were laid-out in strip-split plot design with four replications. The vertical-plots were assigned with times of foliar application with yeast extract and boron (after 75 and 90 days from sowing). The horizontal-plots were occupied with foliar spraying with yeast extract levels i.e. without spraying (control treatment), spraying with 2, 4 and 6 g yeast/liter. The sub-plots were allocated to foliar spraying with boron levels (control, 100 and 200 mg boron/liter). The results showed that delaying spraying sugar beet plants with yeast extract and boron from 75 up to 90 days from sowing resulted in gradual and significant increases and recorded the highest value for each of root and top fresh and dry weights/plant, root dimensions, purity and sucrose percentages, root and sugar yields/fad., as well as the decrease in the values of sodium, potassium and α-amino nitrogen percentages of sugar beet juice. The best results of yield components, root juice quality parameters and yields were resulted from foliar spraying sugar beet plants with yeast extract at the rate of 6 g/liter in both seasons. The highest values of all aforementioned yield components, root juice quality parameters and yields were obtained as a result of spraying sugar beet plants with 200 mg boron/liter in both seasons. It can be recommended that spraying sugar beet plants after 90 days from sowing with 6 g yeast extract and 200 mg boron/liter to maximize sugar beet productivity and quality under the environmental conditions of sandy soils.

The aim of this research is to study the influence of sowing models (one side of ridges, 60 cm apart, 15 cm between hills and both sides of terraces, 90 cm apart, 20 cm between hills), nitrogen fertilizer levels (70, 90 and 110 kg N/fad.) and biofertilization treatments (treate soil with Cerialin, Rhizobacterin and the mixture of Cerialin and Rhizobacterin) on yield and quality of sugar beet, Karam cultivar under sandy soil conditions. Two field experiment were carried out at Kalabsho Experimental Farm, Dakahlia Governorate, Sugar Crops Research Institute, Agricultural Research Center, Egypt, during 2014/2015 and 2015/2016 seasons. The experiments were carried out in splitsplit plot design with four replications. The main plots were assigned to sowing models. The sub-plots were occupied with nitrogen fertilizer levels. While, the sub-sub plots were allocated with biofertilization treatments. The obtained results showed that sowing sugar beet in both sides of terraces, 90 cm apart, at 20 cm between hills attained the highest values of yield components, most of root juice quality parameters and yields, followed by sowing in one side of ridges, 60 cm apart, at 15 cm between hills in both seasons. The highest value for each of yield components, most of root juice quality parameters and yields were produced from fertilizing beet plants with 110 kg N/fad in both seasons. However, application of 90 kg N/fad., induced the highest value of sugar yield and the second best value for each of yield components, root juice quality parameters, top and root yields without significant differences between them in most cases in both growing seasons. Application the mixture of Cerialin and Rhizobacterin produced the highest value for each of yield components, most of root juice quality parameters and yields in the two seasons. It can be concluded that sowing sugar beet in both sides of terraces, 90 cm apart, at 20 cm between hills and treat soil with the mixture of Cerialin + Rhizobacterin (225 g/fad., of each) biofertilizers in addition of mineral fertilizing with 90 kg N/fad., to improve productivity and quality of sugar beet under sandy soil conditions.

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This study was carried out in 2007/2008 and 2008/2009 seasons at Mallawi Agric. Res., Station, Minia Governorate, Egypt, to investigate find out the relative response in vegetative and qualitative characteristics of some commercial sugar cane varieties i.e. G.84-47, G.T.54-9 and Phil.8013 at three seeding rates (1.5, 2.0 and 2.5 drills) grown as a spring plant cane. The results showed that there were significant differences in stalk height and diameter, BRIX% , sucrose%, purity%, reducing sugars%, sugar recovery%, millable cane yield and recoverable sugar yield of the studied sugar cane varieties in the two seasons and their combined, except recoverable sugar yield where the differences among varieties were insignificant in the two seasons and their combined. Meanwhile, there were significant differences in stalk height, stalk diameter, BRIX%, sucrose%, purity%, reducing sugars%, sugar recovery%, millable cane yield and recoverable sugar yield/fed between the three seeding rates in the two seasons and their combined, except purity% in the first season. The interaction between Phil8013 variety with 2.5 drills seeding rates well as G.T.54-9 and G.84-47 varieties with 2.0 drills seeding rate can be recommended under the Middle Egypt conditions (Minia Governorate) to produce the highest yield of millable cane and recoverable sugar yields/fed.

The present study was conducted at Shandaweel Agricultural Research Station (26.5013° N, 31.7651° E), Sohag Governorate , Egypt in 2015/2016 and 2016/2017 seasons to deternine optimize irrigation interval and seed rate of sugarcane production. The current study included eighteen treatments representing the combinations among two sugarcane varieties (Giza-Taiwan 54-9 and G. 2003-47), three irrigation intervals (10, 15 and 20 days) and three seed rates of (25200, 37800 and 50400 buds/fed) resulted from one, one and half and two rows of seed setts . /furrow which contain three buds for each, respectively. The treatments were allocated in a Randomized Complete Block Design using a split-split plot arrangement with three replications. The results showed that decreasing irrigation intervals from 20 to 15 days significantly increased stalk length, stalk diameter, number of millable canes/fed, cane and sugar yields/fed in both seasons. However, brix, sucrose and sugar recovery percentages were negatively and significantly affected by increasing the period between irrigations. Varieties differed significantly in their response to all the studied characters. The commercial variety G.T.54-9 recorded higher values of stalk length, stalk diameter and cane yield/fed, while the promising variety G. 2003-47 had higher number of millable canes/fed, brix, sucrose and sugar recovery percentages as well as sugar yield, in both seasons. Planting sugarcane using two rows of seed setts/furrow attained significant increases in stalk length and the number of millable canes/fed, in both seasons, while thickest stalks were obtained by 1.0 drill of cane cuttings. The higher brix, sucrose and sugar recovery percentages, cane and sugar yields were obtained by 1.5 drills of cane cuttings in both seasons. Under conditions of the present investigation, planting any of the evaluated cane varieties using 1.5 and/or 2.0 drills of cane setts and irrigating them at 10 and/or 15-day intervals can be recommended to get the maximum cane yield/fed. However, planting sugarcane variety G. 2003-47 using 1.5 drills of cane cuttings and irrigating it every 15 days can be recommended to obtain the highest sugar yield/fed.