This soil from Iowa is dark due to high organic matter content
This soil from Iowa is dark due to high organic matter content; combined with high plant-available, water-holding capacity due to a high silt concentration. Soils with these characteristics are present in parts of the United States, Russia, and South America, making them among the great grain-producing regions of the world.
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In this article readers are introduced to the many facets of soils - their unique characteristics and diversity, the ecosystem services that soils provide, and their use and misuse.
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