The antonyms for the phrase "bringing under cultivation" are "desertification," "abandoned land," "uncultivated," and "wilderness." Desertification is the process by which fertile land becomes desert due to natural or human activities. Abandoned land refers to an area that has been previously cultivated or used for some purpose but has been left forgotten or neglected. Uncultivated land is land that has never been cultivated or used for any agricultural purposes. Wilderness refers to an area that is untouched by human activity, where the natural ecosystem thrives without any manipulation or maintenance. These antonyms highlight the importance of responsible land use and cultivation practices for human survival and ecosystem sustainability.