Fig. 7
From: Legume-based rotation enhance long-term soil carbon storage in eastern Oregon dryland wheat systems
Carbon (C) sequestration potential (t C ha⁻¹ yr⁻¹) in wheat cropping systems converted from high-intensity tillage (winter wheat–summer fallow, WW–SF) to a legume-cereal crop rotation (winter wheat–spring pea, WW–SP). (A) Schematic representation illustrating how C sequestration rates were estimated, beginning with a WW–SF system depleted in C as the baseline, followed by a C reaccumulation phase after adopting WW–SP system. The attainable sequestration potential, denoted as \(\:P1\) and \(\:P2\), is assessed under conventional tillage (CT) and no-till (NT) at a 30 cm depth. (B) C sequestration rates in bulk soil and mineral-associated organic matter (MAOM), along with annual CO2 reduction in carbon dioxide equivalents (CO2e) estimated in \(\:P1\) and \(\:P2\).
