Abd Alla, A.M.; M.H. Khider and M.H. Riad( 2010). Status Of Different Forms Of Calcium, Magnesium And Sodium In Some Soils Of South SinaiJ. Biol. Chem. Environ. Sci., 2010,Vol. 5(2):357 -368
Abstract: The current work has been performed to study the status of different forms of calcium, magnesium and sodium in ten soil profiles varying in their characteristics in some soils of South Sinai. The obtained results show that total, exchangeable and acid soluble Ca were ranged from 590-12000 ppm, 1.3-18 meq./100g soil and 4.61-152.72 ppm, respectively. Also, it is found that total Ca content depends to a large degree on CaCO3.
Exchangeable Ca is affected by the clay and silt contents. The profiles Nos.5 and 6 that contain the lowest value of acid soluble Ca exhibit the lowest average values of EC.
Data also indicate that total, exchangeable and acid soluble Mg forms were differed from 500-9500 ppm, 0.35-4.95 meq./100g soil and 1.05-29 ppm respectively. The highest values of total Mg are accompanied by the highest values of EC, while the lowest ones accompanied by the lowest ones of EC. Exchangeable Mg values are generally lower than exchangeable Ca in the studied profiles. On the other hand the values of total, exchangeable and ammonium nitrate soluble Na were ranged from 1220-10000 ppm, 0.15-2.15 meq./100g soil and 2.65-3000 ppm respectively. The highest values of total and extractable are due to the highest values of EC.
Statistical analysis shows significant correlations between different forms of Ca, Mg & Na and some soil properties.
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