University of Tabriz Water and Soil Science 2008-5133 26 1-1 2016 05 21 The Role of Land Use Change on Some Soil Physicochemical Properties (Case Study:Watershed Basin of Keyasar Galooga) The Role of Land Use Change on Some Soil Physicochemical Properties (Case Study:Watershed Basin of Keyasar Galooga) 159 171 4848 FA MR Riahi G Vahabzadeh R Raei Journal Article 2016 06 20 The change of forest to agricultural lands has serious effects on the amount of soil organic<br />matter and physico- chemical characteristics. Noting the increasing change of forestry land use in<br />Mazandaran province, this study was conducted to investigate the effects of land use change on soil<br />characteristics in the Nekaroad watershed. For this purpose, soil samples were collected from the<br />two depths (0-10 and 10-20 cm) and three different land uses (forest, pasture and agriculture). Then<br />the sample were compared based on a randomized complete block design. The results showed that<br />the bulk density, Calcium carbonate, pH and sand percent of the soil were increased while the soil<br />porosity, cation exchange capacity, silt and clay percent were decreased with the change of forest<br />land use to pasture and agriculture. The amounts of organic matter in the soil layer with the depth of<br />0-10 cm at the agricultural and pasture lands compared to forest land were decreased about 35.70<br />and 21.85 %, respectively. Similarly, the reduction of organic matter in the soil layer with the depth<br />of 10-20 cm in the same lands were 36.22 and 22.64%, respectively. The maximum total nitrogen<br />was 0.37 %, which was observed in the soil depth of 0-10 cm at forest land while the minimum of it<br />was 0.16 % in the soil depth of 10-20 cm at agricultural land which showed a reduction of 56.75%. The change of forest to agricultural lands has serious effects on the amount of soil organic<br />matter and physico- chemical characteristics. Noting the increasing change of forestry land use in<br />Mazandaran province, this study was conducted to investigate the effects of land use change on soil<br />characteristics in the Nekaroad watershed. For this purpose, soil samples were collected from the<br />two depths (0-10 and 10-20 cm) and three different land uses (forest, pasture and agriculture). Then<br />the sample were compared based on a randomized complete block design. The results showed that<br />the bulk density, Calcium carbonate, pH and sand percent of the soil were increased while the soil<br />porosity, cation exchange capacity, silt and clay percent were decreased with the change of forest<br />land use to pasture and agriculture. The amounts of organic matter in the soil layer with the depth of<br />0-10 cm at the agricultural and pasture lands compared to forest land were decreased about 35.70<br />and 21.85 %, respectively. Similarly, the reduction of organic matter in the soil layer with the depth<br />of 10-20 cm in the same lands were 36.22 and 22.64%, respectively. The maximum total nitrogen<br />was 0.37 %, which was observed in the soil depth of 0-10 cm at forest land while the minimum of it<br />was 0.16 % in the soil depth of 10-20 cm at agricultural land which showed a reduction of 56.75%. https://water-soil.tabrizu.ac.ir/article_4848_1275fd72d6ecb993e8f3fb0aa68cad05.pdf