Effects of Topographic Factors on Cultivated-Land Ridge Orientation in the Black Soil Region of Songnen Plain

Topographic factors are essential to the spatial distribution of ridge orientation, yet literature shows limited exploration mechanisms underlying effects terrain on cultivated-land orientation in a black soil region. To better understand this subject, interpretation, statistical analyses and field verification were carried out Songnen Plain, typical Mollisol area. The results revealed that inclined-ridge cultivation was most common farming method study When slope gradient cultivated land greater than 13°, influence obvious, residual angle increased with increase slope. There strongly significant negative correlation between azimuth angle, proportion curves all orientations respect different aspects axisymmetric angles 0°–180°. relationship among indices such as gradient, aspect could be modeled using Poly2D function. This indicates topographic dominant factor ridge-orientation selection, provides scientific basis for block-scale protection utilization region; however, configuration requires further research.