الفهرس 
Study of Chemical Behavior of Phosphorus Derived from Bone char and Bone Ash Compared to Conventional Phosphate Fertilizers Applied to Calcareous SoilsOnly 14 pages are availabe for public view
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Abstract
The high cost and various environmental problems related to the production of
phosphate fertilizers as well as their excessive and continuous application pose major challenges in modern agriculture.Therefore, a set of laboratory experiments were conducted to study the properties and mineral composition of animal bone ash and charcoal produced by incineration at a temperature of 600, 700 and 800 degrees Celsius as sources of phosphorous and compared them with traditional fertilizers such as phosphate rock
and single superphosphate, and this was done using x-rays, surface area, pore analysis and electron microscopy in addition to For infrared analysis.
Also, a study was studied to estimate the solubility of phosphorus in
unconventional sources of bone ash and char and compared it with conventional
sources of phosphate rock and mono superphosphate extracted with distilled water, sulfuric acid, formic acid, citric acid or sodium bicarbonate. The results showed that bone ash is most soluble in distilled water (299.25 mg P / kg), then bone char (63.97
mg P / kg), then phosphate rock (21.85 mg P/ kg) representing the corresponding
dissolved phosphorous respectively 0.64,0.14, 0.0047 % Of the water soluble
phosphorus of the mono-superphosphate fertilizer, which is 100% water soluble. For phosphorous dissolved in a dilute acid solution (sulfuric acid 0.005 mol / l) the results were similar to the phosphorous concentrations dissolved in water where the highest concentration of phosphorus was released from bone ash (315.49 mg phosphorous / kg) followed by bone char (91.06 mg P / kg). Then phosphate rock (30.23 mg P / kg).
The results also showed the rate of dissolution in a solution of dilute acids in order of bone ash (0.053%), bone char (0.0154%), phosphate rock (0.051%).
The experiment of moistening and drying the soil for a period of 120 days was
shown after adding the different sources of phosphorous (bone ash, bone char,
phosphate rock and mono-superphosphate fertilizer) in addition to comparing these treatments with similar treatments by adding nitrogen and potassium to know the effect of adding them on the availability of phosphorus in the soil. The results showed that the changes in the pH values of soil suspension, water soluble calcium and available phosphorous extracted by the Olsen method after 20- 40-60-80-120-120
days of soil incubation were slight in relation to the pH assessment in all treatments 76with the exception of soil treated with SSP trait. The pH increased from 7.23 after 20 days to 7.93 after 120 days.