The changes in the physical and hydraulic properties of a loamy soil under irrigation with simpler-reclaimed wastewaters

•Wastewater irrigation significantly increased the aggregate stability.•Bulk density partially decreased under wastewater irrigation conditions.•Wastewater irrigation affected the pore size distribution by decreasing macroporosity and increasing microporosity.•Narrowed soil pores led to a decrease i...

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Bibliographic Details
Published in:Agricultural water management 2015-08, Vol.158, p.213-224
Main Authors: Tunc, Talip, Sahin, Ustun
Format: Article
Language:English
Subjects:
Aggregate stability
Bulk density
Density
Freshwaters
Infiltration
Irrigation
Pore size distribution
Porosity
Soil (material)
Waste water
Wastewater treatment
Water retention
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Summary:•Wastewater irrigation significantly increased the aggregate stability.•Bulk density partially decreased under wastewater irrigation conditions.•Wastewater irrigation affected the pore size distribution by decreasing macroporosity and increasing microporosity.•Narrowed soil pores led to a decrease in the infiltration rate.•Increase of the micropores provided an increase in the available water retention. Soil physical properties (bulk density, particle density, total porosity, pore size distribution and aggregate stability) and hydraulic properties (water retention and infiltration) may be affected significantly from wastewater irrigation. In addition, environmental conditions may change the magnitude of these effects. Therefore, we examined the effects of irrigation with simpler-reclaimed wastewaters on the certain soil properties under cauliflower and red cabbage planting with two-year study in a semi-arid region with a cool climate. W1 (filtered wastewater), W2 (filtered and aerated wastewater) and W1-FW (mix of filtered wastewater with the freshwater at the ratio of 1:1 as volume) were the wastewater treatments. Control plots were irrigated with freshwater (FW) provided from groundwater. Soil electrical conductivity and organic C content in wastewater irrigated plots were higher than the freshwater irrigated plots. Moreover, exchangeable sodium percentage was low in wastewater plots (
ISSN:0378-3774
1873-2283
DOI:10.1016/j.agwat.2015.05.012