'Cultivated' in the Bible

You will defeat every fortified city and every important city. You must chop down every productive tree, stop up all the springs, and cover all the cultivated land with stones."

They tore down the cities and each man threw a stone into every cultivated field until they were covered. They stopped up every spring and chopped down every productive tree. Only Kir Hareseth was left intact, but the slingers surrounded it and attacked it.