Fig. 1. Soil organic carbon (SOC) in the 7.6- to 15.2-cm depth in the annual crop (spring wheat-winter wheat-sunflower) rotation as a function of N fertilizer rate for the no-till (NT), minimum-till (MT), and conventional-till (CT) treatments.
Fig. 1. Soil organic carbon (SOC) in the 7.6- to 15.2-cm depth in the annual crop (spring wheat-winter wheat-sunflower) rotation as a function of N fertilizer rate for the no-till (NT), minimum-till (MT), and conventional-till (CT) treatments.