Humus is the dark carbon sponge that keeps soil fertile
Humus is the sticky, dark organic matter left after microbes thoroughly process dead leaves, roots, and fungal remains — a long-lived carbon store mixed through topsoil.
It holds water like a sponge, cushions roots against drought and flood pulses, and keeps nutrients from washing straight into streams. Dark color also helps soil warm gently in cool seasons.
Fertility is architecture, not only fertilizer bags. Building humus through intact plant and fungal cycles is a quiet conservation habit that outlasts a single growing season.
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