deficit- irrigation is one of the measures for water saving and optimum application of water in surface irrigation. however, lack of enough evidences, doubts on the proper application of deficit- irrigation, dissemination of research results and its application by the farmers are of practical challenging issues. this paper summarizes and analyzes some research results on deficit- irrigation in ...

18 Many dryland areas are being converted into intensively managed irrigation crops, what 19 can disrupt the hydrological regime, degrade soil and water quality, enhance siltation, 20 erosion and bank instability, and affect biological communities. Still, the impacts of 21 irrigation schemes on the functioning of terrestrial and aquatic ecosystems are poorly 22 understood. Here we assess the ef...

Localized studies of arsenic (As) in Bangladesh have reached disparate conclusions regarding the impact of irrigation-induced recharge on As concentrations in shallow (≤50 m below ground level) groundwater. We construct generalized regression models (GRMs) to describe observed spatial variations in As concentrations in shallow groundwater both (i) nationally, and (ii) regionally within Holocene...

Gary A. Clark Research Agricultural Engineer Subsurface drip irrigation (SDI) systems deliver water to the root zone of crops using polyethylene drip tubing that is permanently buried below the soil surface. In properly designed and operated systems, little or no wetting of the soil surface occurs, nor is there visual evidence of the system performance. Because SDI systems apply water different...

PURPOSE To evaluate the alterations on the surface of gutta-percha cones (GPCs) on exposure to the different irrigation solutions and their possible antibacterial effect against Enterococcus faecalis. (E. faecalis). MATERIALS AND METHODS Disinfection ability of different solutions (5.25% sodium hypochlorite, 2% chlorhexidine, 1% peracetic acid, and QMix) were tested with 96 GPCs and the time ...

demand for water resources in different parts of the world, necessitate the use of wastewater. in using wastewater the soil health must be considered. this study was carried out at green space zob ahan in the years 1382 to 1385. in this study, the effects of urban and industrial wastewater irrigation on some chemical properties of soil for three years by using five different irrigation treatmen...

Multi-objective optimization was used to calibrate a regional surface water-groundwater model of the Yaqui Valley, a 6800 km2 irrigated agricultural region located along the Sea of Cortez in Sonora, Mexico. The model simulates three-dimensional groundwater flow coupled to onedimensional surface water flow in the irrigation canals. It accounts for the spatial distribution of annual recharge from...