Classes 1-3 are considered prime agricultural land, and are protected by land use policies in certain provinces, including Ontario. Classes 2-6 have certain limitations for arable crop production, denoted by sub-classes which specify the limitations of the soil (for example, excessive water, adverse climate, stoniness).
In some provinces, like Ontario, prime agricultural land is classified into classes 1-3, with stricter regulations to protect them. Classes 2-6 have limitations on arable crop production due to specific soil conditions, such as excess water, unfavorable climate, or rocky terrain.