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      • Open Access Article

        1 - Three years effect of iron and magnesium nano-particles on the stability of aggregates and some soil chemical properties
        Elahe Daraei Hossein Bayat Pouya Zamani
        Little is known about the long term effects of nanoparticles on soil properties. Therefore, the objective of this study was to investigate the three years effects of nanoparticles on aggregate stability and some of the soil chemical properties. Different amounts (1, 3 a More
        Little is known about the long term effects of nanoparticles on soil properties. Therefore, the objective of this study was to investigate the three years effects of nanoparticles on aggregate stability and some of the soil chemical properties. Different amounts (1, 3 and 5 percentage by weight) of two types of nanoparticle of metal oxides, MgO and Fe3O4 were mixed with a loamy soil in three replications and their possible effects on different properties of the soil after three years were investigated. The results showed that application of nanoparticles, increased the pH of the soil from 7.7 in the control to 8.1- 9.3 and the electrical conductivity from 0.31 in the control to 0.34 -0.56 dSm-1, due to the increase in the alkali cations. The percentage of calcium carbonate increased from 19.75% in the control to 20.5-22.7% due to the accumulation of nanoparticles in the soil, with the highest increase in three variables with 5% magnesium nano oxide. 3% nano iron oxide significantly increased the cation exchange capacity from 23.50 in the control to 24.28 cmolc/kgsoil. Also the nanoparticles increased the mean weight diameter, due to their high specific surface area, with the greater effect of magnesium nano oxide (increased from 33 to 1242 percentage compared to the control) than iron nano oxide (increased from 97 to 173 percentage compared to the control). In general, the results of this study showed that, nanoparticles with specific physico-chemical properties can affect some properties of soil. Manuscript profile
      • Open Access Article

        2 - Effects of nano particle foliar application of iron nano on some morphophysiological traits of Wheat (Triticum aestivum L.), at Shahr- e Qods rejion
        mitra bakhtiyary payam moaveni behzad sani
          This experiment was done to evaluate the effect of nano iron oxide on some morphophysiological traits  of wheat (Triticum aestivum L.) at  Shahr-e Qods region  in years of 2013 and 2014. Experimental design, was factorial in a randomized complete b More
          This experiment was done to evaluate the effect of nano iron oxide on some morphophysiological traits  of wheat (Triticum aestivum L.) at  Shahr-e Qods region  in years of 2013 and 2014. Experimental design, was factorial in a randomized complete block with four replications. Treatments included, treatment of date of nano iron sparaying in milky  and pasty stage and another treatment was, concentrations of nano iron 0, 0.01, 0.02, 0.03 and 0.04 percent. Traits that measured was 1000 grain weight,grain yield,gluten and amount of grain starch. The final results showed that, the effect of date of nano iron sparaying, was significant only on the gluten, starch, 1000 grain weight, grain yield while, of nano iron concentrations treatment, was significant on gluten, starch, 1000 grain weight, grain yield. Interaction effect of date of sparaying and concentrations of nano iron oxide, was not significant on all characteristics. Final results  showed that at effect of stages , maximum amount of grain yield,1000 grain wight,starch and gluten was obtained in milky stage.also results  from spraying with concentrations of nano iron oxide showed that maximum amount sof 1000 grain weight ,grain yield and gluten of grain obtained in 0/04 percent .while most amount of starch obtained in 0 concentraion. Manuscript profile