This article has some great visualizations of US land use: https://www.bloomberg.com/graphics/2018-us-land-use/
About a quarter of US land is dedicated to ‘unprotected’ timber. About ten percent of that belongs to one single business - https://www.weyerhaeuser.com/
Agriculture is a little less (about a fifth), pasture is a little more (about a third) - although that includes range land which is barely ‘land use’ at all.