نتایج جستجو برای: classic and center pivot irrigation was 792 tha
تعداد نتایج: 16911109 فیلتر نتایج به سال:
Information and data about quantification comparison of crop water productivity indices for various irrigation levels methods nitrogen (N) application timings “simultaneously” under the same conditions do not exist. Unprecedented extensive field experiments were conducted maize (Zea mays L.) in 2016 2017 center pivot (CP), subsurface drip (SDI) furrow (FI) with full treatment (FIT), 80 % FIT, 6...
Abstract. Irrigation is important for agricultural production and often decisive this, especially in arid semi-arid areas, where precipitation insufficient. In Brazil, irrigated agriculture responsible 46% of withdrawals from water bodies 67% the consumption total volume collected, representing highest consumptive use country. Remote sensing technologies have great potential developing methods ...
this work is presented in five parts. in the first part preparation of the starting complex [pt(c^n)cl(dmso)], 1, in which c^n = n(1),c(2?)-chelated, deprotonated 2-phenylpyridine, and dmso = dimethylsulfoxide, and its reaction with 1 equiv of the biphosphine ligands bis(diphenylphosphino)amine, dppa, or bis(diphenylphosphino)methane, dppm, to give the complex [pt(c^n)cl(dppa)], 2, or [pt(c^n)c...
High-power diesel-based or grid-connected irrigation systems are being replaced by battery-free, high-power stand-alone Photovoltaic Irrigation Systems (PVIS) that reduce energy costs up to 80% and for which no experimental performance data available. The operation of PVIS is affected various factors, some unrelated the quality PV system itself, generate losses affect their performance: vary wi...
When chemicals are applied using irrigation systems, there is potential for contamination of the water source by backflow if the irrigation system shuts off while unattended. This study was conducted to determine the operating and performance characteristics of new, i.e., unused, chemigation backflow prevention assemblies (CBPAs). Four manufacturer's models were tested in the laboratory. Howeve...
this research was conducted in two protect and destroy region in the middle zagros, in illam province. in order to identification of ecological species group and evaluate density of regeneration, effect of many factors such as protection, vegetation, physiographic factors, physical and chemical properties of soil in study locations were studied. to achieve these purpose number of 54 plots using...
hydrochlorothiazide (hct) is a diuretic agent which is shown to be effective in the treatment of hypertension. literature reports have demonstrated that urinary excretion data may be used to assess the bioavailability of various formulations containing this thiazide. also hct consumption by the athletes is one of the drugs which should be regulated by world anti-doping agency (wada), because of...
A field experiments were conducted for three growing seasons (2007 to 2009) at five different sites of soil types and salinity levels. Five different ground water qualities were used to irrigate five fields each with area of 50 to 54 hectares planted with wheat crop and the irrigation system used at each field was center pivot sprinkler system. The irrigated fields were located at different loc...
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