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Articles by Jaber Fallahzade
Total Records ( 4 ) for Jaber Fallahzade
  Marjan Padidar , Ahmad Jalalian , Majid Abdouss , Payam Najafi , Naser Honarjoo and Jaber Fallahzade
  Wind erosion is a widespread phenomenon causing land degradation in arid regions. The capacity of nanoclay in soil erosion control has been assessed in wind tunnel experiments as a novel technology. To study the effect of nanoclay on stability of sandy soils against wind erosion, a laboratory research program was set up in wind tunnel. The soil samples were treated with distilled water as control and nanoclay at a rate of 2000 ppm were uniformly spread on the soil surface. The treatments were performed in the condition with wind velocity of 31.0, 55.2 and 67.3 km h–1. The results showed that soil volumetric water content at 300 kPa increased (about 18.9%) with application of nanoclay. There was a positive function between the erosion amount and soil moisture content in the treatment of soil with nanoclay. The soil erosion amount decreased (more 99%) with the application of nanoclay. The proportion of 0.25-2 mm fraction increased (2.5%) and the proportion of 0-0.25 mm fraction significantly decreased (74%) with use of nanoclay. As a result nanoclay is able to fixate the sand and it has ability to stabilize the soil structure, increase aggregation and of course decrease soil erosion.
  Elaheh Peykanpour , Ahmad Mohammadi- Ghehsareh and Jaber Fallahzade
  The main objective of this study was to investigate the effects of water ozonated and salinity on some properties of cucumber. The treatments were defined by a two-factorial design of three water ozonated (0, 0.5 and 1 mg L–1) and three water salinity levels (2, 4 and 6 dS m–1). A greenhouse experiment was conducted and after germination, cucumber seeds were grown in pots containing soil, coco peat and perlite and were imposed with water ozonated and salinity treatments. The fruit yield, plant height, stem diameter, total soluble solids and some elements were determined. The results showed that salinity of irrigation water significantly reduced fruit yield and plant height of cucumber. However, statistical testing showed significant increase in total soluble solids with increasing water salinity. Ozonated water increased fruit yield, especially in water salinity 2 dS m–1. Also, application of ozonated water caused significantly increases in the plant height. The results also indicated that salinity and ozonated water reduced stem diameter of cucumber, although there were not significant differences. The highest fruit yield (22.76 kg m–2) and plant height (137.2 cm) were obtained at the third level of ozonated water (1 ppm) and 2 dS m–1 of salinity level. Statistical testing indicated significant increase in concentration of P and Na with increasing water salinity. The application of ozonated water and water salinity caused decreases in concentration of NH4. The highest concentration of P (0.41%) and Na (2.76%) were obtained at the third level of ozonated water (1 ppm) and 6 dS m–1 of salinity level.
  Jaber Fallahzade and Mohammad Ali Hajabbasi
  Soil carbohydrates and particulate organic matter may be considered as appropriate indicators of soil quality. Data regarding the soil carbohydrate fractions and particulate organic matter in forest and cropland soils in Central Iran is scarce. The main objective of this study was to analyze the effects of converting native forests to cropland on soil organic matter, soil carbohydrate fractions (carbohydrates extracted with distilled water, 0.5 M Na2SO4 and 0.5 M H2SO4 by the oven and shaker methods) and particulate organic matter in Lordegan region of central Zagros Mountains, Iran. Soil samples from forest Oak (Quercus brantii Lindl.) and cropland soils (tomato and snap bean) were taken from 0-20 cm depth. Forested and deforested soils were classified as typic calcixerolls and typic calcixerepts, respectively. The results showed that the amounts of total and particulate organic matter in native forest were almost four and twelve times higher (p<0.001) than those in the cropland site, respectively. Similarly, the ratio of particulate organic matter to soil organic matter was far greater in native forest (0.53) compared to cropland (0.19) site. Conversion of native forest to cropland resulted in significant decreases in soil carbohydrate fractions. For both soils, ANOVA indicated that extracted carbohydrate was lower in the shaken compared to the oven method. The concentrations of carbohydrate extracted with H2SO4 were higher than those extracted with Na2SO4 while those extracted with Na2SO4 transcended results when using water for both soils.
  Anahita Moradi , Naser Honarjoo , Jaber Fallahzade and Payam Najafi
  This study was planned to investigate the concentrations of heavy metal in soils and crops and estimate the potential health risks of metals to humans via consumption of crops grown at industrial sites (Zarrinshahr and Mobarakeh) and control site (Natanz) in Isfahan province, central Iran. The soils and food crops (wheat and rice grains and onion bulbs) were digested by acid digestion method and then were analyzed for Mn, Cu and Zn by atomic absorption spectrophotometer. The results showed that the concentration of Zn in the soils of Mobarakeh was higher than the soils of Zarrinshahr and Natanz. The concentrations of Mn in the soils of Natanz and Mobarakeh were higher than the soils of Zarrinshahr. The concentration of Zn in the wheat was significantly higher than that rice and onion crops. The concentrations of Zn and Cu were higher in wheat crop in Mobarakeh compared with other cases. Results of this study revealed that the concentrations of Zn, Cu and Mn in the soils of studied sites were below than the maximum allowable levels. The average concentration of Zn, Cu and Mn metals in rice, wheat and onion crops were below than the maximum allowable levels of WHO guideline. The estimated daily intakes of heavy metals from the crops of three sites were lower than the tolerable daily intake recommended by FAO/WHO. Consequently, these crops cannot be an important source of Zn, Cu and Mn for risk to human health.
 
 
 
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