AGRITE
Agrite series are natural bio-mineral fertilizers and soil amendments for optimum growth and yield of all crops. Agrite fertilizers provide soil and plant with macronutrients, micronutrients, various natural mineral supplements and beneficial elements. Agrite fertilizers create and sustain optimum soil fertility (chemically, physically and biologically).

VIGRO
Vigro series are organic-based liquid fertilizers for vigour growth and for optimum yield and quality of all crops. Vigro fertilizers provide plant with macronutrients, chelated micronutrients, various organic supplements and beneficial elements. Vigro fertilizers create optimum conditions for plant absorption, redistribution and utilization of nutrients. Vigro fertilizers support the plant through the growing season and under stressful environment conditions.

Gizatec has extensive experience in international agriculture. Gizatec provides environmentally-friendly fertilizers to support the mandate of the farmers to maximize their profit. Gizatec fertilizers are based on proprietary agricultural technology jointly developed by company scientists and international research institutes. These fertilizers serve both plant and soil, and have been proven to increase yield, enhance quality, and improve soil fertility.

Mission : To provide solutions, to the global farming community with innovative, High quality, affordable and environmentally-friendly fertilizers, for Maximum economic return.

Vision : To lead the global market, of environmentally-friendly fertilizers for Optimum yield.

ABSTRACT
The potential role of S in developing desert agrosystems has been explored. Semi-pilot and pilot field trials on sulfur applications to soils were shown to correct several soil problems in arid and semi arid regions. Sulfur applications reduce soil pH, decrease salt accumulation and increase nutrients availability. Such favorable effects of sulfur were promoted by mixing S with nutrients carrying minerals, urea and bentonite. Inoculation of this mixture with S oxidizing bacteria, enhances the oxidation of S and maximizes its favorable effects. Besides, applying bentonite into the mixture increases water retention in sandy soils, while the reduction of pH upon the oxidation of S increases the hydraulic conductivity of alkali clayey soils. Moreover, a great synergetic effect is obtained, whenever S is mixed with magnetic materials (Ferro-magnetic and/ or paramagnetic particles) in the soil-plant system. Magnetic energy of certain soil components increases by S application. A mixture of all the above-mentioned materials is now produced under the name of Nile-Fertile®

Key Words: Sulfur Oxidation; CaCO3/clay; Cl-/SO42; Nutrients Uptake; Magnetic Susceptibility.

Nile-Fertile® is a natural fertilizer, containing S, urea, nutrients-rich minerals and magnetic particles. It is also inoculated with S oxidizing bacteria. Nile-Fertile® is produced by Giza Technology, 344 El-Hegaz st., 6 October City, Egypt.

PROMOTION OF SULFUR APPLICATIONS TO SOILS

Effect of S and P on Properties of Root Zone
A field experiment was conducted in a virgin sandy soil, cultivated for the first time with lupine. Normal practices were applied to all field plots. Sulfur (at a rate of 200 kg/acre), super-phosphate (at a rate of 100 kg/acre) and combined S & P were applied at random to certain plots. Effects of treatments on nutrient movement to root zone and on root depth were evaluated.

Even though sulfur was mixed with the topsoil, considerable effect on the pH and phosphate content of subsurface soil was obtained. Only 4 weeks after sulfur application, pH of the root zone dropped from 8.0 in control plots to 7.7 in S treated plots. Phosphate availability in the same zone increased from few ppm in control plots to 35 ppm in phosphate treated plots to more than 85 ppm in sulfur treated plots, fig3. Movement of sulfate from topsoil was also increased several folds.
Movement of nutrients to subsurface and drop of pH seemed to maintain better growth conditions for root growth, it was shown that active root zone did not exceed 6 cm depth in S non treated plots compared to a zone of. 25 to 35 cm in sulfur treated plots. Maximum root penetration depth increased from 25 cm to 65 cm due to application of 200 kg S/acre. It can be observed from fig4 that both of strong and week plants in control plots are shallow rooted while strong and week plants in sulfur treated plots are deep rooted.
The depth of root zone is of special significance under limited water supply. Shallow rooted plants face complete damage due to temperature, drought and/or due to root infection.

Interaction effects of S, P and N:

Due to discrepancies in results concerned with the effect of S application on plant growth, in contrary to its emphasized effect on soil properties, it was thought important to investigate further the enhancing and retarding effects of different sulfur applications on plant production under different soil types. Therefore, field trials were conducted in sandy, calcareous and clay loam soils. The impact of different rates of S, P and N applications on some crops were evaluated



Effect of phosphorus and sulfur applications on certain properties on root zone

Effect of sulfur application on depth and distribution of lupine roots

Results indicated a positive combined effect of sulfur and nitrogen on the yield of garlic and squash in a loamy soil and with a lesser degree on the yield of fodder beet and wheat in sandy calcareous soils. A retarding effect of excessive sulfur application was recorded under all levels of added phosphorus on the yield of clover in the sandy soil. A sharp decline in clover yield was obtained in the treatment S P (one ton of sulfur + 300 kg super-phosphate).

Combined application of S and P was shown to increase the yield of garlic by 21%. The positive effect of S on bulb weight exceeded its effect on total garlic yield table4. This indicates that S contributes mostly to the eatable part while P and N contributes to total yield (straw included).

Sulfur Urea Mixtures

The response of peas to different sulfur-urea mixtures and to other fertilizer combinations was evaluated in a sandy soil.

Table5 shows that adding 50 kg sulfur resulted in significant increase in the yield of pods, ranging between 50% in the first picking and 15% in the third one. Increasing the rate of sulfur addition to 100 kg/acre gave twice as much yield of pods in the first picking. Further increase in sulfur addition to 200 kg/acre gave three times as much pods as compared to zero addition. Interesting to note that such recorded increases are true only in the first picking which is the most important from the economical point of view.

Effect of different S, P and N applications on the yield of garlic in a clay loamy soil