Effect of Selenium, Sulfur and Phosphor fertilization on Shoot Dry Weight of Maize (Zea mays L.) Grown in Two Different Soils

An experiment was conducted on maize crop (Zea mays L.) in plastic pots in two different soils (Qurna soil, which is poor organic matter and the other soil from Maysan marshes, which is rich in organic matter), to study the effect of selenium, sulfur and phosphate and their interaction on dry weight of shoot of maize crop. Selenium was added at four levels (0, 10, 20 and 40 g Se ha), sulfur at three levels (0, 30 and 60 kg S ha), and phosphorus at three levels (0, 60 and 120 kg P ha).

Economical and technical Study of replace the field solvent (NaOH) with improved solvent to prevent sulfur deposition in gas wells

In this paper, detail technical and economic feasibility study are implemented to use the improved solvent instead of the used solvent in Syrian field (Sodium hydroxide, NaOH) until this time, to prevent and remove the sulfur deposits in the gas wells that most suffer from this problem. Has also been confirmed on the technical best method for suggested solvent injection and depend on the field data of the studied wells /Jbissah-223, Jbissah-220/ to carrying out the required economical calculations, and the sensitivity analyzing for changes of economical with changes of dollar exchange rate and gas production rate from studied wells are performed, and then the curves of economic Feasibility study resulting from the comparison process was drawing. And recommending the use of the improved solvent where this solvent is the most economic solvent.

Using the chemical method to removal the sulfur deposition in the tubes of sour gas production in Jbissah fields

In this paper, a proposal a chemical solvent to remove sulfur deposits within the tubes production of the wells that most suffer from this problem are done. Where the study was conducted on the referenced study about the characteristics and forms of sulfur in the nature, and explain the Scheme phasic of sulfur and required conditions for the deposition of elemental sulfur within the tubes production. And has been clarified the mechanism of deposition and the outline of a simplified process for the nuclei of molecules from supersaturation sulfur vapor. Has also been depend on the field data of the studied wells /Jbissah-223, Jbissah-220/ (taken from the daily operational reports and Historical Biography of the wells), to conducting laboratory experiments in order to compare the between used solvent at field (NaOH) and proposed solvent (tallow amine activated diethyl disulfides) in this study in terms of the melt the deposited sulfur within the tubes production. and as a result, the curves resulting from the comparison process was drawn and recommending the use of the proposed solvent in treatment the acid gas wells in Jbissah fields that suffer from this problem where this solvent is the most effective and economical.

Postharvest Application of Acetic Acid Vapour Improved Quality and Storage Ability of "Baladi" Grape Cultivar During Cold Storage

Grape Vitis Vinifera L. var. "Baladi" was fumigated with acetic acid at two concentrations 75 and 100 %, during two successive seasons 2008/2009, to study their effect comparing of sulfur dioxide pads and control. However, Sulfur dioxide pads were packed in 40 μm polyethylene bags thickness at two concentrations 1 and 1.5 g/ kg fruit. All treatments were stored at 0 ± 1 Cº and 90-95% RH for three months, in cooling units of pome and vine research department in Swaida. Chemical and physical properties were assessed every 15 days intervals, and in every time shelf life was measured for three days at room temperature and calculated as total loss %. Acetic acid treatment effected as well as or better than sulfur dioxide pads during cold storage. Which, acetic acid fumigation decreased weight loss %, decay % and berry shatter %, moreover, berry adherence strength (g) and berry firmness (kg/cm2) were increased, but T.S.S %, total acidity % and sugars % have not significant differences comparing to sulfur dioxide fumigation and control. In addition to that, the application of acetic acid increased shelf life in days by decreasing total loss %; also this treatment improved some sensory properties and was satisfied for consumer demand.

Study of the Relative Agronomic Effectiveness of a Syrian Phosphate Rock, and the Effect of Mixing with Different Ratios of Elemental Sulfur

A pot experiment was conducted to evaluate the relative agronomic effectiveness (RAE%) of a Syrian phosphate rock when it is added alone and as mixture with elemental sulfur with three different ratios (PR:S) (2:1) (5:1) (8:1) and compared with triple superphosphate. The main results of this study showed that Ain Layloun phosphate rock was not effective for direct use by Rye grass when used alone, but it became effective when mixed with elemental sulfur. The relative agronomic effectiveness was varied following mixing ratios, it was 50%, 76% and 87% in (8:1), (5:1) and (2:1) (PR:S) mixing ratios respectively. This is due to the increase of available soil phosphorus content which is related to the increase of phosphate rock solubility due to decrease of pH derived from oxidation of sulfur by Thiobacillus spp.