Fig. 2. Change in soil organic C (SOC) and N (SON) by soil depth for the first 5-yr period (1985–1989) and the second 5-yr period (1989–1993) averaged over locations [evapotranspiration (ET) gradient] and cropping systems.
Fig. 2. Change in soil organic C (SOC) and N (SON) by soil depth for the first 5-yr period (1985–1989) and the second 5-yr period (1989–1993) averaged over locations [evapotranspiration (ET) gradient] and cropping systems.