soil是什么意思？

Soil refers to the upper layer of the Earth's crust, composed of minerals, organic matter, water, air, and organisms, that supports plant growth. It is a vital natural resource that provides nutrients, water retention, and a habitat for various organisms. Soil is formed through weathering of rocks, deposition, and decay of organic matter. It plays a crucial role in agriculture, acting as a medium for plants to anchor their roots and obtain necessary nutrients. Soil also helps in the filtration and purification of water by acting as a natural sponge, retaining and releasing water slowly. Overall, soil is a complex, dynamic ecosystem that is essential for sustaining life on Earth.

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