How can cover crops protect soil during the off-season?

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A row of cattle with brown and black coats eat feed from a long trough in a South African feedlot, separated by wooden fencing. — Feed Feedlot cattle eating grain in an intensive animal farm in South Africa.

Cover crops play a vital role in soil management by protecting land during the off-season when it is not occupied by cash crops. They provide several key benefits:12

Erosion Control: By physically holding the soil in place, cover crops prevent erosion caused by wind and water.12
Nutrient Enhancement: These crops help increase soil nutrients and provide essential organic matter.1
Humus Production: They contribute to the soil's supply of humus, which improves soil structure and fertility.23

When these crops are turned into the soil, they decompose to return nutrients and organic matter, which prepares the land for the next planting cycle. Common examples of cover crops include rye, buckwheat, cowpea, and vetch.21