The present study has analyzed the effects of different grazing intensities on soil chemical properties

including nitrogen, phosphorus, potassium and organic matter content in different conditions of reference

area, key and critical areas located in Savojbolagh, Iran during 2004-2005. Data produced based on randomized

complete block design plot. In this case, study area, time and depth of sampling were appropriated

for main plots and sub-plots, respectively. Statistical analysis was done using SPSS version 12. If significant

differences were found between treatments then Duncan test was used for comparison of means.

According to the results, there were significant differences between NPK rates during two years. The rate

of organic matter, nitrogen and phosphorus was increased in second year and the amount of potassium was

decreased. Animal grazing significantly affected soil chemical characteristics in all areas (reference, key

and critical). There were significant differences between content of nitrogen, phosphorus, and potassium

in two years, during the grazing season and between the two depths.