Relative changes of chemical properties of calcareous soils treated by organic acids under different salinity levels of irrigation water [electronic resources].

Includes references.

This laboratory experiment was carried out to study the individual and combined effect of two organic acids (humic and oxalic acids) and salinity levels of irrigation water on the changes of chemical properties and the content of available phosphorus of two calcareous soils of Egypt. The soils were treated by either humic or oxalic acid at application rates of 0, 0.1,0,2 and 0.4% and irrigated by one of irrigation water resources varied in their salinity levels at 100% of soil field capacity. The used three water resources were tap water (W1), sea water (W3) and mixed water between W1 and W3 with mixed ratio of 1:1 (W2). This experiment was carried out in plastic pots, where it arranged in completely block randomized system with three replicates. These pots were incubated at room temperature (25 ± 2 'C)for 6 months. After that, soil pH, EC (dSm-1), CEC (meq/100g), total and active CaC03 (%) and the content of available P (mg/kg) were determined. Keywords: Calcareous soils, Organic acids, Salinity level, Relative changes, Soil chemical properties and Available phosphorus.

Summary in Arabic.

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