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Articles by H.M.V. Samani
Total Records ( 2 ) for H.M.V. Samani
  A.A. Naseri , Y. Hoseini , H. Moazed , F. Abbasi and H.M.V. Samani
  Phosphorus (p) adsorption characteristics of 5 soil samples were studied in soils of Southeastern Iran during 2009/2010 cropping season. Some soil properties as well as selected P-adoption characteristics were studied in these soils, Results show for this study Freundlich adsorption isotherm has good match with phosphorus adsorbed data and has good R-square. Freundlich sorption isotherms were used to evaluate the P requirement of 5 soils in a lab study. The soils were medium to heavy textured, acidic in reaction and were highly calcareous. Amount of P sorbed by the soils increased with increasing P in equilibrium solution. Quantities of P retained on sod solid phase were significantly correlated (p<0.05) with clay content of the soils. Maximum P was sorbed by a soil that had the maximum (64%) Clay content. there were negative relationship between P adsorption capacity and SOC and Ca content of soils.
  A.A. Naseri , Y. Hoseini , H. Moazed , F. Abbasi , H.M.V. Samani and S.A. Sakebi
  The objective of the present study was to understand Phosphorus transport from soil columns at different water flux densities and to compare computer simulation results using HYDRUS-3D and the physical model against column-experiment data. Towards that end, two water flux densities (0.0075, 0.0065 m sec-1) and P concentration rates (33 mol cm-3) were used. The soil used has a silty clay- loam texture. The numerical model (HYDRUS-3D) successfully predicted P transport in the present experiment. Overall, the HYDRUS-3D model successfully simulated the water flow in the columns; however, it overestimated the final adsorbed PO4 concentrations in the soil. The present column experiment is useful for assessing relative behavior of P in increasing the movement of phosphorus ions out of the soil profile and into ground waters.
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