The adjusted R2 values of regression models for SOM and nutrients with land use, landscape position and slope aspect ranged from 0.501 (SOM) to 0.134 (AP).
Characterizing spatial variability of soil nutrients in relation to site properties, including climate, land use, landscape position and other variables, is important for understanding how ecosystems work and assessing the effects of future land use change on soil nutrients.
Samples from 76 sites were collected during June–July of 2002 to measure water stable aggregates, aggregate carbon concentration, total carbon content and C/N ratios, and analyze the effect of aggregate size, land use, landscape position (summit, shoulder, backslope) and depth on these properties.
Because land use and landscape position are the most important factors that influence soil nitrogen, understanding the effects of landforms and slope position on the distribution of soil nitrogen is an important prerequisite for estimating soil quality on the Loess Plateau.
Here we evaluate the response of small mammals to environmental variables, including vegetation characteristics, land use and geographic position.
Analyses of variance indicated an interaction effect of land use and landscape position on water stable aggregates and aggregate carbon concentration, while a main effect of land use on total carbon content and C/N ratios.
Soil pH decreased by an average of 3.5 units across the entire elevation gradient and decreased by 1 unit with elevation even after SOC, land use and landscape position were included in multiple regression models.
In order to assess the effects of land use and landscape position on soil nutrients consisting of soil organic matter (SOM), total N (TN), total P (TP), available N (AN) and available P (AP), soil samples were collected in August and October 1998 and July 1999 from three transects in a small catchment on the loess plateau, China.
The SOC contents and soil erosion phases can be affected by losses or gains of organic C-rich sediments from tillage translocation and erosion, by management input level differences, oxidation, or as a result of land use and landscape position variations.
Critics of Ms. Norton, however, have attacked her positions on land use and private property and view the groups with which she has been affiliated as antienvironmental.
