Soil is the central component of terrestrial ecosystems and, as the biologically active skin of our planet's land surface, plays a primary role in all global biogeochemical cycles. Soil is key to ...

a product that often gives carbon-rich soils their characteristic dark color (Fig. 2). These various forms of SOC differ in their recalcitrance, or resistance to decomposition. Humus is highly ...

Favor dark soil that breaks apart easily and is rich with the scent of earth, and steer clear of sticky or foul-smelling ...