This dataset observes soil and nutrient loss from runoff plots at a monitoring station in the black soil area in 2021. The details of the runoff plots are as follows: A1: 3°, smooth monopoly, planted with soybeans; A2: 3°, cross monopoly, planted with soybeans; A3: 3°, bare ground; B1: 5°, smooth monopoly, planted with soybeans; B2: 5°, cross monopoly, planted with soybeans and planted with purple acacia as a plant hedge; B3: 5°, bare ground.