RT - Journal Article T1 - Effect of Land Use Shifting and Overgrazing on Loss of Selected Soil Phosphorus Forms in Two Regions of Vanak Watershed JF - JCPP YR - 2009 JO - JCPP VO - 12 IS - 46 UR - http://jcpp.iut.ac.ir/article-1-1146-en.html SP - 595 EP - 606 K1 - Land use changing K1 - Soil degradation K1 - Phosphorus forms K1 - Phosphorus loss. AB - The forms and dynamics of soil phosphorus can be greatly affected by land use changes, which often involve changes in vegetation cover, biomass production and nutrient cycling in the ecosystem. Present research evaluates the impact of land use change on the amount of total organic and inorganic P, labile, moderately labile and nonlabile P pools in semiarid soils of central Zagros. Samples were collected from surface soils (0-10 cm) of i) of moderately degraded pasture (20-25% plant cover), ii) highly degraded pasture (5-10 % plant cover), and iii) cultivated field (10 years) in Soolegan sub watershed and i) moderately degraded pasture (25-30 % plant cover) and ii) highly degraded pasture (5-10 % plant cover) in Sadat Abad sub-watershed. Significantly (P LA eng UL http://jcpp.iut.ac.ir/article-1-1146-en.html M3 ER -