The Experts below are selected from a list of 49395 Experts worldwide ranked by ideXlab platform
Anders Dalsgaard - One of the best experts on this subject based on the ideXlab platform.
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wasteWater irrigated vegetables market handling versus Irrigation Water Quality
Tropical Medicine & International Health, 2007Co-Authors: Jeroen H J Ensink, Tariq Mahmood, Anders DalsgaardAbstract:harvest, analysed for the presence of the faecal indicator, Escherichia coli, and helminth eggs in Faisalabad, Pakistan. Vegetables from the same harvested batch were collected approximately 12 h later from the local market. results The survey found relatively low concentrations of E. coli (1.9 E. coli per gram), but relatively high concentrations of helminths (0.7 eggs per gram) on vegetables collected from agricultural fields. Higher concentration of both E. coli (14.3 E. coli per gram) and helminths (2.1 eggs per gram) were recovered from the vegetables collected from the market. conclusions The results of the survey suggest that unhygienic post harvest handling was the major source ofproducecontamination.Interventions atthemarket,suchastheprovisionofcleanWater towash produce in, are better ways to protect public health and more cost effective than wasteWater treatment.
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wasteWater irrigated vegetables market handling versus Irrigation Water Quality
Tropical Medicine & International Health, 2007Co-Authors: Jeroen H J Ensink, Tariq Mahmood, Anders DalsgaardAbstract:OBJECTIVE AND METHODS Vegetables irrigated with untreated domestic wasteWater were, at the time of harvest, analysed for the presence of the faecal indicator, Escherichia coli, and helminth eggs in Faisalabad, Pakistan. Vegetables from the same harvested batch were collected approximately 12 h later from the local market. RESULTS The survey found relatively low concentrations of E. coli (1.9 E. coli per gram), but relatively high concentrations of helminths (0.7 eggs per gram) on vegetables collected from agricultural fields. Higher concentration of both E. coli (14.3 E. coli per gram) and helminths (2.1 eggs per gram) were recovered from the vegetables collected from the market. CONCLUSIONS The results of the survey suggest that unhygienic post harvest handling was the major source of produce contamination. Interventions at the market, such as the provision of clean Water to wash produce in, are better ways to protect public health and more cost effective than wasteWater treatment.
Jeroen H J Ensink - One of the best experts on this subject based on the ideXlab platform.
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wasteWater irrigated vegetables market handling versus Irrigation Water Quality
Tropical Medicine & International Health, 2007Co-Authors: Jeroen H J Ensink, Tariq Mahmood, Anders DalsgaardAbstract:harvest, analysed for the presence of the faecal indicator, Escherichia coli, and helminth eggs in Faisalabad, Pakistan. Vegetables from the same harvested batch were collected approximately 12 h later from the local market. results The survey found relatively low concentrations of E. coli (1.9 E. coli per gram), but relatively high concentrations of helminths (0.7 eggs per gram) on vegetables collected from agricultural fields. Higher concentration of both E. coli (14.3 E. coli per gram) and helminths (2.1 eggs per gram) were recovered from the vegetables collected from the market. conclusions The results of the survey suggest that unhygienic post harvest handling was the major source ofproducecontamination.Interventions atthemarket,suchastheprovisionofcleanWater towash produce in, are better ways to protect public health and more cost effective than wasteWater treatment.
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wasteWater irrigated vegetables market handling versus Irrigation Water Quality
Tropical Medicine & International Health, 2007Co-Authors: Jeroen H J Ensink, Tariq Mahmood, Anders DalsgaardAbstract:OBJECTIVE AND METHODS Vegetables irrigated with untreated domestic wasteWater were, at the time of harvest, analysed for the presence of the faecal indicator, Escherichia coli, and helminth eggs in Faisalabad, Pakistan. Vegetables from the same harvested batch were collected approximately 12 h later from the local market. RESULTS The survey found relatively low concentrations of E. coli (1.9 E. coli per gram), but relatively high concentrations of helminths (0.7 eggs per gram) on vegetables collected from agricultural fields. Higher concentration of both E. coli (14.3 E. coli per gram) and helminths (2.1 eggs per gram) were recovered from the vegetables collected from the market. CONCLUSIONS The results of the survey suggest that unhygienic post harvest handling was the major source of produce contamination. Interventions at the market, such as the provision of clean Water to wash produce in, are better ways to protect public health and more cost effective than wasteWater treatment.
Steven R Raine - One of the best experts on this subject based on the ideXlab platform.
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validating laboratory assessment of threshold electrolyte concentration for fields irrigated with marginal Quality saline sodic Water
Agricultural Water Management, 2018Co-Authors: A Dang, Mcl J Bennett, Alla Marchuk, Serhiy Marchuk, A J W Biggs, Steven R RaineAbstract:The use of marginal Quality saline-sodic (MQSS) Water for agricultural production is important in Water limited environments and with a growing demand for food and fibre. Soil structural response to Irrigation Water Quality is known to be a function of sodium contained in the Irrigation Water and the electrolyte concentration of that Water. The threshold electrolyte concentration (CTH) is classically used to determine the suitability of Water to be applied to a soil, and is usually conducted as a laboratory analysis utilising saturated hydraulic conductivity. This work aimed to validate the laboratory based semi-empirical disaggregation model approach to CTH against field soils where MQSS Water had been applied for an extended period of time. Unirrigated locations proximal to long-term Irrigation sites were paired to provide control conditions and the CTH was determined. Reduction in hydraulic conductivity from the control was determined as both observed and predicted data. Results supported validation of the approach, indicating the disaggregation model as useful for proactive planning of Irrigation systems with regard to Water Quality and a good measure for identification of MQSS Water as a strategic resource. Applicability of the results to Irrigation guidelines was discussed with particular focus on removal of generalised guidelines and identification of what constitutes tolerable hydraulic conductivity reduction.
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quantifying the aggregation dispersion boundary condition in terms of saturated hydraulic conductivity reduction and the threshold electrolyte concentration
Agricultural Water Management, 2018Co-Authors: A Dang, Mcl J Bennett, Alla Marchuk, Andrew J W Biggs, Steven R RaineAbstract:Marginal Quality saline sodic Water will be important for agricultural production in Water limited environments, and has been demonstrated as suitable for Irrigation on a soil-specific basis. Suitability is usually demonstrated as the threshold electrolyte concentration (CTH), defined as a 10–20% reduction in saturated hydraulic conductivity. Others have suggested that the aggregate-dispersion boundary may be used as this threshold, which is also known as the threshold turbidity concentration (CTU). Using a saturated hydraulic conductivity approach, this work sought to quantify the extent of reduction at the CTU and compare this to traditional CTH approaches to define the practicality of the thresholds. The CTU was determined as the point where dispersed clay was detected, and subsequently compared to the CTH with the difference between these compared within the measured domain. The reduction in saturated hydraulic conductivity from a Ca dominant stable condition was determined at each threshold value. It was found that saturated hydraulic conductivity at the CTU reduced by between 44 and 78% for the five Vertisol soils investigated, demonstrating that the CTU varied between soils and was substantially more than the 10–20% reduction in hydraulic conductivity at the CTH. Discussion on application of these thresholds to practical Irrigation is provided, and suggests that Irrigation Water Quality application can be optimised on a soil-specific basis. Results reinforce that management guidelines should not be based on the CTU, or at the aggregation-dispersion boundary.
Tariq Mahmood - One of the best experts on this subject based on the ideXlab platform.
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wasteWater irrigated vegetables market handling versus Irrigation Water Quality
Tropical Medicine & International Health, 2007Co-Authors: Jeroen H J Ensink, Tariq Mahmood, Anders DalsgaardAbstract:harvest, analysed for the presence of the faecal indicator, Escherichia coli, and helminth eggs in Faisalabad, Pakistan. Vegetables from the same harvested batch were collected approximately 12 h later from the local market. results The survey found relatively low concentrations of E. coli (1.9 E. coli per gram), but relatively high concentrations of helminths (0.7 eggs per gram) on vegetables collected from agricultural fields. Higher concentration of both E. coli (14.3 E. coli per gram) and helminths (2.1 eggs per gram) were recovered from the vegetables collected from the market. conclusions The results of the survey suggest that unhygienic post harvest handling was the major source ofproducecontamination.Interventions atthemarket,suchastheprovisionofcleanWater towash produce in, are better ways to protect public health and more cost effective than wasteWater treatment.
-
wasteWater irrigated vegetables market handling versus Irrigation Water Quality
Tropical Medicine & International Health, 2007Co-Authors: Jeroen H J Ensink, Tariq Mahmood, Anders DalsgaardAbstract:OBJECTIVE AND METHODS Vegetables irrigated with untreated domestic wasteWater were, at the time of harvest, analysed for the presence of the faecal indicator, Escherichia coli, and helminth eggs in Faisalabad, Pakistan. Vegetables from the same harvested batch were collected approximately 12 h later from the local market. RESULTS The survey found relatively low concentrations of E. coli (1.9 E. coli per gram), but relatively high concentrations of helminths (0.7 eggs per gram) on vegetables collected from agricultural fields. Higher concentration of both E. coli (14.3 E. coli per gram) and helminths (2.1 eggs per gram) were recovered from the vegetables collected from the market. CONCLUSIONS The results of the survey suggest that unhygienic post harvest handling was the major source of produce contamination. Interventions at the market, such as the provision of clean Water to wash produce in, are better ways to protect public health and more cost effective than wasteWater treatment.
A Dang - One of the best experts on this subject based on the ideXlab platform.
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validating laboratory assessment of threshold electrolyte concentration for fields irrigated with marginal Quality saline sodic Water
Agricultural Water Management, 2018Co-Authors: A Dang, Mcl J Bennett, Alla Marchuk, Serhiy Marchuk, A J W Biggs, Steven R RaineAbstract:The use of marginal Quality saline-sodic (MQSS) Water for agricultural production is important in Water limited environments and with a growing demand for food and fibre. Soil structural response to Irrigation Water Quality is known to be a function of sodium contained in the Irrigation Water and the electrolyte concentration of that Water. The threshold electrolyte concentration (CTH) is classically used to determine the suitability of Water to be applied to a soil, and is usually conducted as a laboratory analysis utilising saturated hydraulic conductivity. This work aimed to validate the laboratory based semi-empirical disaggregation model approach to CTH against field soils where MQSS Water had been applied for an extended period of time. Unirrigated locations proximal to long-term Irrigation sites were paired to provide control conditions and the CTH was determined. Reduction in hydraulic conductivity from the control was determined as both observed and predicted data. Results supported validation of the approach, indicating the disaggregation model as useful for proactive planning of Irrigation systems with regard to Water Quality and a good measure for identification of MQSS Water as a strategic resource. Applicability of the results to Irrigation guidelines was discussed with particular focus on removal of generalised guidelines and identification of what constitutes tolerable hydraulic conductivity reduction.
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quantifying the aggregation dispersion boundary condition in terms of saturated hydraulic conductivity reduction and the threshold electrolyte concentration
Agricultural Water Management, 2018Co-Authors: A Dang, Mcl J Bennett, Alla Marchuk, Andrew J W Biggs, Steven R RaineAbstract:Marginal Quality saline sodic Water will be important for agricultural production in Water limited environments, and has been demonstrated as suitable for Irrigation on a soil-specific basis. Suitability is usually demonstrated as the threshold electrolyte concentration (CTH), defined as a 10–20% reduction in saturated hydraulic conductivity. Others have suggested that the aggregate-dispersion boundary may be used as this threshold, which is also known as the threshold turbidity concentration (CTU). Using a saturated hydraulic conductivity approach, this work sought to quantify the extent of reduction at the CTU and compare this to traditional CTH approaches to define the practicality of the thresholds. The CTU was determined as the point where dispersed clay was detected, and subsequently compared to the CTH with the difference between these compared within the measured domain. The reduction in saturated hydraulic conductivity from a Ca dominant stable condition was determined at each threshold value. It was found that saturated hydraulic conductivity at the CTU reduced by between 44 and 78% for the five Vertisol soils investigated, demonstrating that the CTU varied between soils and was substantially more than the 10–20% reduction in hydraulic conductivity at the CTH. Discussion on application of these thresholds to practical Irrigation is provided, and suggests that Irrigation Water Quality application can be optimised on a soil-specific basis. Results reinforce that management guidelines should not be based on the CTU, or at the aggregation-dispersion boundary.
