Objective: Soil salinity is one of the major worldwide environmental constraints affecting agricultural production in arid and semiarid regions. Lack of proper management of water and soil resources lead to increase soil salinity and reduce soil fertility. On the other hand, it seems simple and cheap method of measuring soil salinity is necessary. The aim of this study was to determine the rela...

background: in this study, the chemical quality of water in some sub-basins of gamasiab river has been investigated for a long term planning of water consuming in the region . methods: the area is about 11 x10 3 km 2 , located in ramadan and kermanshah, the two western regions of iran. in this regard the results of the water samples, which were collected on the outlet of the 13 hydrometrical st...

PURPOSE To present and discuss numerical calculations of the specific absorption rate (SAR) and temperature in comparison to regulatory limits. While it is possible to monitor whole-body or whole-head average SAR and/or core body temperature during MRI in practice, this is not generally true for local SAR values or local temperatures throughout the body. While methods of calculation for SAR and...

The aim of this study was to implement and evaluate a flexible and time-efficient interleaved imaging approach for the acquisition of proton and sodium images of the human knee at 7 T within a clinically relevant timescale. A flexible software framework was established which allowed the interleaving of multiple, different, fully specific absorption ratio (SAR)-validated scans. The system was ab...

     For investigation deficit irrigation and nitrogen application effect on nutrients uptake of henna ecotypes, this research was conducted in the form of split-split-plot on the basis of randomized complete block design with four replications in the Research Field of Islamic Azad University, Jiroft, Iran in 2013-2014. The main, sub and sub-sub plot were deficit irrigation (100, 75 and 50% of ...

A simple algebraic technique is presented for computing the adjusted sodium adsorption ratio (SAR) index. The statistical formula presented in this note facilitates the computation of the adjusted SAR without the use of a look‐up table, custom computer software, or the need to compute exact individual ion activity coefficients and complexes. A short data analysis example is also presented that ...

soil characteristics is very important in water erosion processes. the present investigation was conducted in gully lands of ardebil province, iran, to assess the role of soil texture and structure on aggregate stability using wet sieve method. to achieve the study purposes, mean weighted diameter of aggregates was calculated, and its relationships with lime and clay percentages, sodium absorpt...

Introduction: Simulations of RF coils loaded with human head and body models are seen in the literature [1-5]. Little research, however, focuses on the loading effects of human head or body dimension on the B1 field, signal to noise (SNR) and specific absorption ratio (SAR). Human head sizes can vary greatly [6] and this may seriously affect these NMR parameters, especially at higher fields. Th...

Introduction A method to reduce the specific absorption rate (SAR) of the SSFP (Steady State Free Precession) based fast spectroscopic imaging (SI) technique spFAST [1] is presented. For spFAST the FID-like signal S1 is acquired while the echo-like signal S2 is suppressed. An optimal flip angle which depends on the relaxation times T1 and T2 and on the repetition time TR is used to maximize the...

As a major source of water for irrigation, the evaluation and assessment groundwater to ensure it meets quality sustainable agriculture is key. This research presents findings its suitability irrigation purposes. was carried out using indices Geographic Information System (GIS). The Inverse Distance Weighted (IDW) method GIS used study spatial distribution these indices. Indices considered incl...