title: Water Quality and Toxic Element Effects on Isohumic Soil Properties and Crops in Semi-arid Regions.
abstract: Treated wastewater (TWW) and freshwater used separately or within the same agricultural soil is a key element in soil parameter evolution, soil-plant pollution and crop yields. The long-term application of TWW increased CaCO3, P, N, K, TOC, metal contents, pH and salinity in isohumic soil in semi-arid and arid climates. Also, it was found that using freshwater after TWW within the same land leached soil compounds and pollutants. Consequently, a clear decline of salinity, pH, macronutrient and pollutant concentrations occured. Therefore, the economic profitability in topsoil decreased. TWW contributed to crop production increase, despite high fertilizer and metal concentrations in TWW and soil. Also, no toxic metal trace was detected in cultivated plants despite soil pollution. Occasional rainwater removed the stable part of fertilizers in topsoil and slightly improved plant development.
authors: Géoressources Laboratory, Water Research and Technology Centre, B.P. 273, 8020, Soliman, Tunisia.
authors: Rim
authors: R
authors: Azouzi
authors: Abdelkrim
authors: A
authors: Charef
authors: Lamia
authors: L
authors: Ayed
mesh_terms: D000383:Agriculture; D018556:Crops, Agricultural / Q000378:metabolism*; D003889:Desert Climate; D005308:Fertilizers; D005618:Fresh Water; D000075322:Heavy Metal Poisoning; D063245:Plant Development; D011041:Poisoning; D054712:Salinity; D012987:Soil / Q000737:chemistry*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis*; D062065:Wastewater; D060753:Water Quality
chemical_list: D005308:Fertilizers; D012987:Soil; D012989:Soil Pollutants; D062065:Wastewater