Heat stress is a major environmental limiting wheat productivity in most cereal growing areas of the world. The objective this study was to evaluate heat tolerance durum (Triticum turgidum var. durum) genotypes. For purpose, 45 genotypes were grown during two seasons (2012–2013 and 2013–2014) under non-stress (normal sowing) heat-stress (late conditions. indices calculated based on grain yield normal sowing (Yp) late (Ys) Results combined analysis variance showed significant influences as...

Phosphorus (P) adsorption characteristics of 5 soil samples were studied in soils Omidie, Southeastern Iran, during 2009/2010 cropping season. Some properties as well selected P-adsoption these soils. In this study, results show Langmuir isotherm had better match with adsorbed P data and maximum R-square. Differences P- greatly influenced by organic carbon (SOC), pH, exchangeable calcium aluminium. Regression analysis showed that SOC Al sat the highest predictors Padsorption study site....

In this study fuzzy logic system was used for optimization parametric evaluation in surface and trickle irrigations. This performed on a area of 5175 ha fathali region located Ardabil province Iran. It indicated that irrigation respectively an about 2941.35 (56.77%) 159.81 (3%) the lands is "highly suitable" 246.43 (4.7%) 312.69 (6%) "moderately suitable". About 797.1 (15.4%) 2744.17 (53.02%) were "marginally "Currently not suitability included 737.58 (14.2%) 1746.05 (33.7%) "Permanently...

It is of high importance to determine the flood discharge different basins, in studies on water resources. However, it necessary use new models hydrograph parameters. Therefore, will be beneficial conduct calibrate models, keeping mind local conditions regions. this study was carried out peak a basin located Southwest Iran, using TR-20, TR55, and HEC-1 methods WMS model (watershed modeling system). The obtained results were compared with empirical values, as well those soil conservation...

Land evaluation for irrigation is the process of predicting land use potential on basis soil attributes. The Food and Agriculture Organization (FAO) framework suitability most commonly used based biophysical properties lands. FAO method application Boolean approach that has been criticized by some researchers. Because representations ignore continuous nature uncertainties in measurement also its inability overcoming problems related to vagueness definition other uncertainties, fuzzy set...

The proper management of irrigation requires an accurate measuring soil moisture. One the commonly applied methods for moisture is use gypsum blocks – a method that simple and quick to apply. However, in saline soils using this prone errors due effect salinity on block. In study, different salinities (1, 2, 6, 10, 18 deci Siemens per meter (dS m−1) measurements block type 5910 A was investigated with two repetitions random sandy loam, clay loam soils, corrective functions were obtained...

In this study, the assimilative capacity changes of Gharehsou River has been studied. River, in East Ardabil province Iran its flow path, is entrance and discharge domestic sewage, industrial wastewater agricultural drainage for determining river, first, calibrated model Qual2kw simulated parameters change NO3, BOD, DO, pH temperature two months January July, then it was compared with observational data Aladizgeh, Samian, Anzob ArbabKandi stations. Given mean correlation coefficient R2...

This research investigate clayey, lateritic and sandy soils have been selected from agricultural lands in the South-Eastern Nigeria, for their phosphate sorption characteristics using column experiments, order ascertain movement of soils. The soil samples were equilibrated 25ml 0.01M CaCl2  containing different concentrations P as KH2PO4 to produce initial 250, 375, 500, 625 750µg/L 14 days at room temperature. Six a backup treatment prepared each concentration sample giving total 25 soil....

In this study, a fuzzy logic system was used to optimise parametric evaluation in surface and sprinkler irrigation systems. This study performed on area of 5,175 ha the Fath-Ali region located Ardabil province Iran. It indicated that for system, an about 385.06 (7.4%) 159.81 (3%) land is "highly suitable" 286.1 (5.5%) 312.69 (6%) "moderately suitable", respectively. About 2,810.08 (54.3%) 2,744.17 (53.02%) were respectively "marginally The "currently not suitability included 1,322.88 (25.5%)...

Abstract Floods are important in studies related to water resources utilization, dam construction, basin management and hydrological studies. Therefore, a large extent, the accuracy of these safety facilities depends on flood study methods. The aim this was investigate WMS model determining maximum discharge three sub-basins with areas 10.3, 1.5 7.3 square kilometers Kuhgel region located southwest Iran. Comparing results Dicken's experimental method showed that volume estimated by well...

Abstract Statistical analysis of saturated hydraulic conductivity is the fundamental engineering plans for water resource projects . In other words, project solutions and designs depend directly on accuracy these statistical analyses methods that develop them to studied area. One recent was used estimate variables such as Kriging method. this study, GIS software purpose kriging method soil. Spherical model with nugget effect 0.0039 sill 0.0262 best variogram determining soil in method, which...