Biennial yellow-flowered Eurasian plant having aromatic leaves used as carminative or flavoring agent; widely cultivated especially as green manure or cover crop.

两年生欧亚植物，花黄色，其叶芳香，用做祛风剂或调味品；广泛栽培，尤其作绿肥或覆盖作物。

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The vegetation and soils in most of the arid and semiarid zones have been degraded, usually by overgrazing and the removal of plant cover by fire or the axe.

大多数干燥和半干燥地带的植被和土壤严重退化，其原因通常是过度放牧及滥砍滥伐和火灾。

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Also show are agricultural land use and land surfaces with little or no plant cover - such as bare ground, urban areas and permanent snow and ice.

BBC: How Earth's land is used

City code says that all unpaved portions of the site shall be planted with grass or ground cover or shrubbery or other suitable live plant material.

FORBES: Oak Park Woman Faces Jail Time for Growing Vegetable Garden

Farmers can also add carbon-rich compost to the soil, and plant "cover crops" such as rye or vetch during parts of the year when land otherwise would lie idle.

NPR: Iowa Farmers Look to Trap Carbon in Soil