The current study was conducted to test antimicrobial activity of aqueous, ethanol, methanol and acetone extracts of camel thorn (Alhagi pseudalhagi) against Gram-positive bacteria (Bacillus subtilis and Clavibacter michiganensis subsp. sepedonicus) and Gram-negative bacteria (Erwinia carotovora subsp. atroseptica), using the agar well-diffusion method. The minimum inhibitory concentration was also determined. Besides, phytochemical constituents of the volatile oil of camel thorn aerial parts were identified using gas chromatography coupled to mass spectrometer (GC-MS) analysis. Data of the antibacterial assay showed significant activity of all extracts against various bacterial strains at the concentration of 256 mg/ml. The methanolic extract showed the highest inhibi-tion zone and the lowest values of minimum inhibitory concentration against all tested bacterial strains. The lowest inhibition zone and comparatively greater minimum inhibitory concentration was induced by the aqueous extract. Ethanol and acetone extracts showed moderate antibacterial activity against all tested bacterial strains. Chromatographic analysis revealed the identification of 66 phytocompounds most of which have been previously reported to possess anti-microbial, antitumor, antiseptic, preservative, insecticidal and antioxidant ac-tivities. The most abundant compounds were 1-(3-Furyl)-4b,7,7,9b,11a-pentamethyl-3,8-dioxohexadecahydrooxireno[d]oxireno[7,8]naphtho[2,1-f]isochromen-5-yl acetate; Hexa-t-butylselenatrisiletane; 4-(2-Methyl-cyclohex-1-enyl)-but-3-en-2-one and 1,3-Dimethyladamantane.

The current study was conducted to test antimicrobial activity of aqueous, ethanol, methanol and acetone extracts of camel thorn (Alhagi pseudalhagi) against Gram-positive bacteria (Bacillus subtilis and Clavibacter michiganensis subsp. sepedonicus) and Gram-negative bacteria (Erwinia carotovora subsp. atroseptica), using the agar well-diffusion method. The minimum inhibitory concentration was also determined. Besides, phytochemical constituents of the volatile oil of camel thorn aerial parts were identified using gas chromatography coupled to mass spectrometer (GC-MS) analysis. Data of the antibacterial assay showed significant activity of all extracts against various bacterial strains at the concentration of 256 mg/ml. The methanolic extract showed the highest inhibi-tion zone and the lowest values of minimum inhibitory concentration against all tested bacterial strains. The lowest inhibition zone and comparatively greater minimum inhibitory concentration was induced by the aqueous extract. Ethanol and acetone extracts showed moderate antibacterial activity against all tested bacterial strains. Chromatographic analysis revealed the identification of 66 phytocompounds most of which have been previously reported to possess anti-microbial, antitumor, antiseptic, preservative, insecticidal and antioxidant ac-tivities. The most abundant compounds were 1-(3-Furyl)-4b,7,7,9b,11a-pentamethyl-3,8-dioxohexadecahydrooxireno[d]oxireno[7,8]naphtho[2,1-f]isochromen-5-yl acetate; Hexa-t-butylselenatrisiletane; 4-(2-Methyl-cyclohex-1-enyl)-but-3-en-2-one and 1,3-Dimethyladamantane.

Foliar application effects of salicylic acid (SA) and gibberellic acid (GA3) were investigated on growth and flowering of Ixora coccinea L. plants. Four concentrations (100, 200, 300 and 400 ppm) of both SA and GA3 were sprayed in addition to the control (water-sprayed plants). Results indicated that all growth and flowering characteristics of Ixora plants were increased by all concentrations of SA or GA3 compared to the untreated plants. Concerning salicylic acid, the lowest concentration (100 ppm) produced the highest plants while 200 ppm increased leaf area and shoot/root ratio. Number of leaves and plant pigments (chlorophyll a, b, a+b and carotenoids) were increased at 300ppm concentration. Spraying the plants with 400ppm increased fresh and dry weight of shoots and roots and flower number. GA3 sprayers at 300 or 400ppm led to a significant increase in most of the characteristics studied in comparison to the untreated plants. The correlation coefficient among most of Ixora vegetative and flowering growth characteristics proved to be significant.

Foliar application effects of salicylic acid (SA) and gibberellic acid (GA3) were investigated on growth and flowering of Ixora coccinea L. plants. Four concentrations (100, 200, 300 and 400 ppm) of both SA and GA3 were sprayed in addition to the control (water-sprayed plants). Results indicated that all growth and flowering characteristics of Ixora plants were increased by all concentrations of SA or GA3 compared to the untreated plants. Concerning salicylic acid, the lowest concentration (100 ppm) produced the highest plants while 200 ppm increased leaf area and shoot/root ratio. Number of leaves and plant pigments (chlorophyll a, b, a+b and carotenoids) were increased at 300ppm concentration. Spraying the plants with 400ppm increased fresh and dry weight of shoots and roots and flower number. GA3 sprayers at 300 or 400ppm led to a significant increase in most of the characteristics studied in comparison to the untreated plants. The correlation coefficient among most of Ixora vegetative and flowering growth characteristics proved to be significant.

The current Investigation was conducted to assess the effect of three sowing dates (October, November and December) and the foliar application of Fe, Mn and Zn and their combinations on growth, flowering and carthamin content of safflower plant. All plant characteristics were significantly affected by sowing dates and micronutrients application. Better growth and higher carthamin content appeared to be more closely related to earliness of planting as October favored the best results. As sowing date was delayed, significant reductions in all plant growth characteristics were noticed. Fe and/or Mn positively affected plant height, branch number/plant, head number/plant and plant fresh weight. However, plant dry weight and petals dry weight/plant had the highest values in Zn-treated plants. Petals content of carthamin recorded the highest values when plants were sprayed with Fe alone or in combination with both Zn and Mn during either October or November. Accordingly, it is recommended that safflower plant is preferably planted in October; otherwise any delay in sowing date will severely affect its yield and quality. To ensure better growth and higher yield of carthamin, a foliar application of Fe at 300 ppm or its combination with Mn at 200 ppm and Zn at 150 ppm is recommended.

The current Investigation was conducted to assess the effect of three sowing dates (October, November and December) and the foliar application of Fe, Mn and Zn and their combinations on growth, flowering and carthamin content of safflower plant. All plant characteristics were significantly affected by sowing dates and micronutrients application. Better growth and higher carthamin content appeared to be more closely related to earliness of planting as October favored the best results. As sowing date was delayed, significant reductions in all plant growth characteristics were noticed. Fe and/or Mn positively affected plant height, branch number/plant, head number/plant and plant fresh weight. However, plant dry weight and petals dry weight/plant had the highest values in Zn-treated plants. Petals content of carthamin recorded the highest values when plants were sprayed with Fe alone or in combination with both Zn and Mn during either October or November. Accordingly, it is recommended that safflower plant is preferably planted in October; otherwise any delay in sowing date will severely affect its yield and quality. To ensure better growth and higher yield of carthamin, a foliar application of Fe at 300 ppm or its combination with Mn at 200 ppm and Zn at 150 ppm is recommended.

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Corn is one of the main cereal crops in the world. Most of agricultural expansion in the world is confined in the desert where shortage of water and unfavorable soil properties and nutrients deficiencies are the most constrains facing any agricultural project proposed for such areas. These soils need a high efficient irrigation and fertilization system for maximizing the production and sustain both the environment and resources available. Using split randomized complete plot design with four replications a field experiment was conducted out to study the effect of soil moisture and form of P fertilizer on uptake of P by corn plant as well as the yield production of corn under the effect of these treatments. Keeping the soil moisture at 125% of field capacity significantly (p0.05) increased the total uptake of P in the 60-days old corn plants from 9.38 to 10.16 kg P fed . 1 Forms of P fertilizers had a little effect on P concentrations in corn plants.Increasing the amount of irrigation water increased the grain and straw yield of corn

Corn is one of the main cereal crops in the world. Most of agricultural expansion in the world is confined in the desert where shortage of water and unfavorable soil properties and nutrients deficiencies are the most constrains facing any agricultural project proposed for such areas. These soils need a high efficient irrigation and fertilization system for maximizing the production and sustain both the environment and resources available. Using split randomized complete plot design with four replications a field experiment was conducted out to study the effect of soil moisture and form of P fertilizer on uptake of P by corn plant as well as the yield production of corn under the effect of these treatments. Keeping the soil moisture at 125% of field capacity significantly (p0.05) increased the total uptake of P in the 60-days old corn plants from 9.38 to 10.16 kg P fed . 1 Forms of P fertilizers had a little effect on P concentrations in corn plants.Increasing the amount of irrigation water increased the grain and straw yield of corn

Corn is one of the main cereal crops in the world. Most of agricultural expansion in the world is confined in the desert where shortage of water and unfavorable soil properties and nutrients deficiencies are the most constrains facing any agricultural project proposed for such areas. These soils need a high efficient irrigation and fertilization system for maximizing the production and sustain both the environment and resources available. Using split randomized complete plot design with four replications a field experiment was conducted out to study the effect of soil moisture and form of P fertilizer on uptake of P by corn plant as well as the yield production of corn under the effect of these treatments. Keeping the soil moisture at 125% of field capacity significantly (p0.05) increased the total uptake of P in the 60-days old corn plants from 9.38 to 10.16 kg P fed . 1 Forms of P fertilizers had a little effect on P concentrations in corn plants.Increasing the amount of irrigation water increased the grain and straw yield of corn