Investigation of Temporal Variations of Soil Properties under the Influence of Amendments and Soil Erosion Process

The soil erosion during the various stages of the process of separation to deposition, destructive affects on the physical and chemical properties of the soil. Today, various soil additives and modifiers are used to protect water and soil around the world. However, the role of organic materials and environmentally friendly materials has not been taken into consideration. Therefore, the aim of present study is to investigate of the effect of four modifiers including biochar, sheep manure, wheat straw and vermicompost in 1 × 2 m 2 plot, intensity 65 millimeter per hour with 3 repetitions and slop 8-12 percent using rainfall simulator. The results showed that long-term rainfall, heavy rainfall and extreme intensity had offset the positive effects of the treatments. However, the process of erosion has changed all the characteristics of the soil. So that the soil texture at the confidence level of 95 percent of the loam class is close to the loom-clay class and reduce 20.68 percent 41.17 and 19.12 percent organic matter, phosphor and potassium, respectively. During the erosion process, the soil lime was washed at 9.63 percent and the soil pH was reduced by 2.54 percent.