Where the name comes from

Black earth was made.

The name points backward to Indigenous knowledge and forward to practical conservation work on today's farms and ranches.

In parts of the Amazon basin, patches of deep, fertile soil sit beside ground that is naturally thin, acidic, and heavily weathered. These soils are known as terra preta—black earth.

Indigenous communities built these soils over generations by combining charred material with pottery fragments, bone, organic waste, and continued cultivation. The result was not simply a product placed on the land. It was a human-made soil system.

Stable carbon mattered because its porous structure could become part of the soil's physical environment. Water, nutrients, and biological activity could interact with that structure instead of passing through the ground as quickly.

The principle, not a shortcut

Modern soil carbon work is related. It is not the same material.

Structure

Stable carbon can become part of the physical structure of soil.

Holding capacity

The goal is ground that can better hold what plants and soil life need.

A whole practice

Material, soil conditions, biology, water, and management all matter.

Why we started here

An old principle inside a modern conservation practice.

NRCS Practice 336, Soil Carbon Amendment, provides a formal conservation standard for applying approved carbon-based amendments to address identified soil resource concerns. Availability, scenarios, and financial assistance vary by location and require a site-specific plan.

Native American Carbon Alliance exists to help producers navigate that modern process without losing sight of the older lesson: soil is a living system, and lasting improvement comes from treating it like one.

Learn about the producer process