Seventeen bacterial isolates have been successfully isolated and purified from soil rhizosphere samples collected from different agricultural areas Buhayra, Sharqia and Alqilyubia of Egypt, and screened for production of chitinase enzymes had the highest chitinolytic activities amongst those investigated. Isolate S3-C and S1-C were Identified by biochemical, physiological tests and 16s rRNA gene primer as Bacillus cereus S3C, Gene Bank NCBI accession MK185696 and Bacillus cereus S1C accession MK185697. The production of chitinase by B.cereus S3C and Bacillus cereus S1C was optimized using colloidal chitin medium amended with 1% colloidal chitin at 30°C after five days of incubation. B.cereus S3C had potential for cell wall lysis of many phytopathogenic fungi tested such as Fusarium oxysporum and Rhizoctonia solani Potato phytopathogenic fungi by in vitro antagonistic test. The addition of B. cereus S3C chitinase was more effective than that of B.cereus S1C in increasing the resistance of Potato plants infected with various Soil- borne phytopathogenic fungi.

The Egyptian agriculture relies on technology to develop the productivity of most of the main crops, including cereal crops, especially wheat, which is reflected in increasing of the cultivated area. According to the Sustainable Development Strategy (SDS): Egypt Vision 2030, The cultivated area with wheat had reached about 1326 thousand feddan in 1980, then it continued to increase until it reached about 1955, and2716 thousand feddan in 1990, and 2007 respectively, and reached its maximum in 2016 by about 3351 thousand feddan. Also, the productivity duplicated from about 1.36 tons/fed. in 1980, and reached about 4..2 tones/fed. in 2016. Egypt plans to reach the area cultivated with wheat to approximately 4.2 million feddan and about 3.6 tons/fed of its productivity in 2030, in order to increase Autarky to about 81% from the locally production. To achieve this target, the absorption of technology must be further increased by increasing the different technology methods, which is reflected in productivity increasing. Wheat crop was selected for the field study through the availability of field data to estimate some economic and statistical indicators that are difficult and it may be impossible to use the secondary data in its estimation. Also, The governorate of El-Behaira was selected According to the relative importance of wheat-cultivated area,where as total area is about 378 thousand feddan representing about 11.27% of total Egyptian cultivated area, it also selected according to the availability of different  types of machines which existing in that region. The study aims at estimate the economic efficiency of agricultural labor use in the light of specific modern technology which is used in Egyptian agriculture, represented by agricultural mechanization technology from the production farms of wheat crop in El-Behaira governorate during the agricultural season (2015-2016) in the short and long run of wheat farmers, where a simple random sample was selected from three villages in El-Behaira governorate (Berijat, Damshli, Alqam), The sample units divided three categories: the first category (less than 0.5 feddan), the second category (0.5 feddan - feddan), the third category (feddan and more) Short and long run for each category, in order to estimate some indicators of production and economic efficiency, and economics of scale. The estimation of short-run production function shows that total elasticity is about 1.3, 1.3, and 1.06 for the first, second and third categories of the sample respectively, while total elasticity is about 1.1 in the long-run, which reflecting the increasing returns to scale and farmers are producing in the first phase of the law of diminishing returns. The estimate of the cost functions in the short-run shows that the optimal production is about 14.1, 36.4 and 88.3 ardabb respectively for the three categories in the study sample, and the optimal production is about 47.7 ardabb in the long-run.

This study aimed to determine the relationship between preharvest treatments by salicylic acid, Larginine and L-tryptophan with fruit quality of pear cv. Le-Conte during cold storage at 0◦C and 9095% RH for 12 weeks followed by shelf life at 22◦C for 12 days. Treatments included L-arginine at 100 and 200 ppm, L-tryptophan at 50 and 100 ppm, salicylic acid at 100 and 200 ppm and water as control, all treatments were sprayed on mature trees until run off twice; at full bloom stage and at initial fruit set stage. All conducted treatments were effective in maintaining fruit quality compared with control. Tryptophan at 100 ppm showed the highest significant TSS values, while salicylic acid at 200 ppm showed the lowest significant TSS values during cold storage and shelf life circumstances. Salicylic acid at 100 and 200 ppm showed the lowest weight loss percentages, salicylic at 200 ppm decreased the rate of decay incidence, showed the lowest significant respiration rates, also it was effective in alleviating core browning. In addition, salicylic acid at 200 ppm significantly maintained firmness of fruits, and showed higher h° value of fruits peel, ascorbic acid concentrations, total phenols content and antioxidant capacity values of LeConte pear fruits. Preharvest treatments by salicylic acid, L-arginine and L-tryptophan positively influenced postharvest fruit quality, salicylic acid at 200 ppm effectively maintained fruit quality during cold storage and shelf life.

Twenty two bacteria were isolated from soil samples local. were assayed for pectinolytic activity after optimization condition for pectinase production. isolate No. 22 showed high pectinase specific activity (91.4U/ml)  on glucose supplemented medium. the identification of the isolate revealed that it belongs to the Genus klebseilla bassed on morphological, biochemical characteristic, growth and molecular level 16s rRNA indicated that isolate was 99% similarity with Klebsiella oxytoca JKo3. Therefore, it was named Klebsiella oxytoca N22.

Two field experiments were conducted in two successive seasons; 2017 and 2018 at Bahi ElDin, Siwa Oasis, Egypt, to study the effect of four boron levels (0, 23, 46 and 69 ppm) as foliar application on yield and its components of five maize (Zea mays L.) hybrids (Single Crosses 124, 168, Three Way Crosses 310, 324 and 352). The experimental design was perpendicular strips plot with three replicates. Results indicated that effect of boron and hybrids on plant height, no. of grains/row, ear length, no. of rows/ear, ear diameter, 100-grain weight, grain, ear and stover yields (kg fed-1) were significant. Maize hybrid S.C. 124 produced the highest values of 100-grain wt., grain and ear yields per fed. Maximum no. of grains/row, ear length and stover yield fed-1 were recorded by TWC 324 hybrid. While, TWC 352 hybrid surpassed in no. of rows/ear and ear diameter. Foliar application by 69 ppm boron significantly produced more grains per row and ear, 100-grain wt. and grain yield/fed. Interactions were significant for all studied traits, except no. of grains/row and ear diameter. Thus, it could be concluded that applying 69 ppm boron as foliar for S.C.124 hybrid could be used successfully for improving maize productivity under Siwa Oasis conditions.

Two trials were carried out at the Experimental Station farm of Desert Research Center, Teggzerty from Siwa Oasis, Matroh Governorate during the two summer seasons, 2015 and 2016. Trials were performed to study response of two maize hybrids.(Single hybrid 131 and Triple hybrid 329) to organic manure (OM) levels (15 and 30 m3/fed.) and five combinations between mineral and nano nitrogen (N) fertilizers: 1)100% mineral N from the recommended dose (120 kg N/fed.), 2)75% mineral + 25% nano N fertilizers, 3)50% mineral + 50% nano N fertilizers, 4)25% mineral + 75% nano N fertilizers, 5)100% nano N as the recommended rate (500 ppm as foliar application). Mineral N rates were added in three equal doses, with foliar application by nano N rates, after 30, 45 and 60 days from sowing. Treatments, included twenty treatments, was laid out in a splilt-split plot design, with three replicates, OM levels were arranged in the main plots, maize cvs. were allocated in the sub plots, and mineral nano N fertilizer treatments were assigned in the sub-sub plots. At harvest the following characters were recorded, plant height (cm), number of rows/ear, ear length (cm), ear diameter (cm), number of grains/row, 100-grain weight (g), ear weight (ton/fed), grain, straw and biological yields (ton/ fed), shelling (%) and harvest index(%). Results indicated that increasing OM levels significantly increased ear length harvest index and protein content (%), in the 2nd season only, triple hybrid gave the maximum values of all pa rameters, except no. of rows/ear and harvest index, in the 1st season, and 100-grain weight and carbohydrate (%), in both seasons, which had no significant difference with single hybrid in the most cases. Concerning with the effect of mineral and nano N, all parameters, except carbohydrate (%), were increased with increasing mineral N (%) and/or with decreasing nano N (%). Fertilized maize crop by mineral N at 100% or 75% plus 25% nano N fertilizer gave the maximum values of plant ht., no. of rows/ear, ear length and diameter, no. of grains/row, 100-grain wt.,ear weight, grain, straw and biological yields, shelling (%), protein (%), protein yield and harvest index in both seasons. However, fertilized maize crop by nano N at 100% produced the highest value of carbohydrate content (%) in two seasons. Results suggested that selected triple maize hybrid cv. (329), at 30 m3 OM, with 100% mineral N (120 kg N/fed.) or with 75% mineral N (90 kg N/fed.) plus 25% nano N (125 ppm as foliar application) fertilizers could be utilized for attaining the maximal improvement in farmer income by increasing the maize yield under saline conditions at Siwa Oasis, Egypt.

Two hundred multiparous Holstein dairy cows post-partum were randomly assigned into two groups. The first group (control, n=100) was fed total mixed ration (TMR) without a supplement of liquid probiotic enzymes. The second group (treatment, n=100) was fed TMR supplemented with a commercial probiotic (ZAD) prepared by Bactizad company, Cairo, Egypt. at the rate of 10 ml/head/day.  According to the guide of the manufacture for 12 weeks ZAD was added and mixed to the TMR at the time of feeding once per day. Each group was placed in a shaded pen equipped with free stalls.    Results obtained showed that     Milk yield increased significantly from 39.57 kg/day for control group up to 41.73 kg/day for treated with ZAD group.  Fat and protein milk percentage tended to be improved due to treated with ZAD but the difference was not significant. Lactose percentage was affected positively and significantly by treated of ZAD, lactose percentage was 4.79 for control group and 4.83 for ZAD group.  Serum total protein increased significantly from 11.52 (g/dl) for control group up to 11.85(g/dl) for treated ZAD group. Albumin was significantly higher in control group.   Results indicated that blood urea concentration in treated group being 34.77 (mg/dl) and for the control group 33.91 (mg/dl), was significantly higher.  Alkaline phosphates increased significantly in treated group from 21.105 U/l for control group up to 26.92 U/l for treated group.   Cholesterol concentration was reduced significantly due to treatment from 240.98 mg/dl in control cows to 190.13 mg/dl in treated cows.  Triglycerides concentration declined significantly due to treatment of probiotic ZAD. In control cows triglycerides concentration was 27.871 (mg/dl) and treated cows was 20.9781 (mg/dl).  T3 concentration increased significantly as a response to treatment by probiotic ZAD. T3 concentration was 117.29 ng/dl in treated group and 62.38 mg/dl in control group.

This paper focuses on treated date seed with two cellulolytic bacteria (Acetobacter xylinum and Thermonospora fusca) isolated from sheep and evaluated these species by Invitro gas production and metabolism trail.  We evaluated the influence of many rations contain several percentage from date seed untreated and treated on In vitro traild for DM,OM, NDF, ADF, cellulose and hemicellulose disappeara (samples incubated for 24 hrs). the best ration used in metabolism trail . The experimental work was conducted in 2017, at the Department of Animal Production, faculty of agriculture, Ain Shams University, Cairo, Egypt and the experiment of the farm animals occurred in the Animal Production research institute.  Our results in this revealed that the ration content 25% untreated and treated with bacteria  had significant values on NDF, ADF and hemicellulose degradability after 24 hours, especially treatment 2 (Thermonospora fusca) of date seed. In  the experimental ration with ascending level of untreated and treated date seed  had not significant effect on pH value while more effect on total gas production (GP),ammonia, TVFA’s, MP, EMP and  metabolizable energy ME (Mcal/ g). The differences were significant (P<0.05) between control ration and other experimental  rations. Furthermore, ration content date seed treated (R3) had the highest values of DM, OM, CF and EE digestibility. It could be noticed that improving CP, CF and cell wall constituents (NDF, ADF, hemicellulose and cellulose) digestibility may be due to the increasing number of rumen cellulolytic bacteria. In conclusion, the bacterial treatment (Acetobacter xylinum and Thermonospora fusca) with date seed successfully to improve chemical compostion of date seed and Invitro digestiability specially ration contain 25% from total dry matter.  It showed that the strain (Thermonospora fusca) was  the best in In vitro fermentation . Digestibility indicated that ration contain treated date seed (R3) was high DM, OM, ADF and nitrogen than other rations.  It was concluded that treated date seed can replace concentrate in rations and improve In vitro degradability, digestibility trail and no effect on rumen and blood parameters without adversely affecting on helthy animals.

A field experiment was conducted at the Experimental Farm at Faculty of Agriculture, Ain Shams University (loam soil); to study herbigation managements for maximizing green beans crop productivity under drip irrigation system. Two application techniques were used for weed control with pre-emergence Pendimethalin herbicide (Stomp 50% EC), the first application technique was injection herbicide through drip irrigation systems (surface and sub-surface) with three concentrations (100%, 75% and 50%) of herbicide recommendation dose (1.7 L/ fed) using venture device, secondly by conventional spraying using knapsack sprayer and control without treatment. The results showed that the best water application efficiency was (96%) and the highest value of water distribution uniformity was (95%) achieved with Sub surface-drip irrigation system. The best weeds control efficiency was (82%) achieved with injection herbicide through sub surface-drip irrigation system with 75% - (1.28 L/fed) - of the herbicide recommendation dose in compare with other treatments, which maximized the benefit from the applied herbicides and obtained high productivity and an export product with high quality. According to the obtained results herbigation with sub-surface irrigation system is an excellent method of controlling weeds for the growers with good management.

This work aimed to study the effect of FYM rates (0, 10 & 20 m3 fed-1) and application in time of N fertilizer on maize grain yield and its attributes using single cross hybrid 130 at two field experiments. The technique of treatment - trait (TT) biplot graph was used to study the interrelationships among maize traits. The Results showed that application of 10 or 20 m3 FYM and adding the recommended N fertilizer on these doses with first, second or third irrigations gave highest values for the grain yield and most agronomic traits. It is obvious that the highest correlation coefficients were obtained between grain yield and each of number of ears plot-1 (NE),ear length (EL), ear diameter (ED) and 100 kernel weight (KW),under Gemmeiza location, while the traits of days to 50%tassiling and silking, plant height (PH), ear height (EH),   number of ears plot-1 (NE) and 100 kernel weight (KW) were the most associated traits with grain yield under Sids location. Using the TT biplot graph, results revealed that the best performance treatments for most studied across the two locations were the application (T11) before as well as application (T10). The results showed that TT biplot graph was an effective statistical tool to study the effects of treatments on yield and its attributes and also to discover the interrelationships among these traits. Accordingly, the maize breeder should give interest in the interrelationships among grain yield and its attributes when planning the breeding program.