The effect of tillage management on spatial variation of some soil properties in steep lands

To study the effects of scale and tillage management on variability of soil properties in adjacent lands of different tillage type, soil sampling was performed linearly along contour line from the middle position of slope with 5 m intervals. In overall, 45 soil samples were collected from a field with conventional up-down tillage and 40 samples from an adjacent filed with contour tillage. Soil samples were analyzed for, soil texture, bulk density, saturation percentage, mean weight and geometric mean diameter of aggregates, organic matter and calcium carbonate equivalent. The data obtained were analyzed based on t-test by SPSS. All of the studied soil properties were significantly (P