what forms the framework of the soil
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Dig down deep into any soil, and you’ll see that it is made of layers, or horizons. Put the horizons together, and they form a soil profile. Like a biography, each profile tells a story about the life of a soil.
Every soil originally formed from parent material: a deposit at the Earth’s surface. The material could have been bedrock that weathered in place or smaller materials carried by flooding rivers, moving glaciers, or blowing winds. Over time, sun, water, wind, ice, and living creatures help transform, or change, the parent material into soil.
As a soil ages, it gradually starts to look different from its parent material. That’s because soil is dynamic. Its components—minerals, water, air, organic matter, and organisms—constantly change. Some components are added. Some are lost. Some move from place to place within the soil. And some components are transformed into others.
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We expect soils to perform multiple functions simultaneously.
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Examples include food production, water purification, carbon sequestration.
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We assess how these diverging functions can be managed coherently.
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In this paper, we present a new framework of Functional Land Management.
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This can be applied to meet both agronomic and environmental land use targets.
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We discuss the policy implications at national and at international level.
Explanation:
Food security soil functions soil quality soil framework directivethematic strategy on soils