Major Land Uses
The U.S. land area covers nearly 2.3 billion acres. In 2012, the latest update to ERS's Major Land Uses (MLU) series, grassland pasture and range uses accounted for the largest share of the Nation's land base, surpassing land in forest uses, which includes grazed forest land, for the first time since 1959. Although the shares of land in different uses have fluctuated to some degree over time, land area in the top three categories (grassland pasture and range, forest, and cropland) has remained relatively stable. Land dedicated to special uses, which includes land in State/national parks and wilderness areas, has increased substantially since the MLU series began 1945. Urban land use has also increased, albeit more modestly, as population and economic growth spur demand for new housing and other forms of development. About 52 percent of the 2012 U.S. land base (including Alaska and Hawaii) is used for agricultural purposes, including cropping, grazing (on pasture, range, and in forests), and farmsteads/farm roads.
Land-use change occurs for a variety of reasons. Changing commodity and timber prices, agricultural and natural resource policies, urban pressure, and environmental factors (e.g., droughts) prompt private landowners to shift land to uses that maximize economic returns. While land-use change can be bidirectional for some uses—such as forestry, grassland, and cropland—conversions to an urban use are typically irreversible. As part of the Major Land Uses program, ERS analyzes trends in all of these uses and examines factors driving broad land-use patterns and trends. Other ERS research takes a more in-depth look at particular issues, including farmers’ land-use decisions in response to ethanol-induced increases in corn demand, the role of crop insurance and other farm programs in grassland-cropland conversions, the effects of drought risk on participation in land retirement programs, and effective targeting of conservation funding to maximize benefits of restoring and conserving wetlands. Technology has also affected land use and regional land-use shifts, especially in cropland. The rapid adoption of new technology, improved crop varieties, improved insect and disease control, and other changes have boosted agricultural productivity to the extent that more production can be obtained from the same cropland base.
In 2012, total U.S. cropland acreage—a category comprising cropland used for crops, idled cropland, and pastured cropland—reached its lowest level (392 million acres) since the MLU series began in 1945. The historic MLU low in total cropland, however, masks divergent trends in the different cropland subcategories. For example, at 340 million acres, cropland used for crops, which accounts for the largest share of total cropland, was slightly above the preceding 20-year average. The trajectory of cropland acreage also varies by region. In 2012, primarily due to atypically high corn prices, cropland used for crops acreage reached its highest level in the previous 15 years in both the Corn Belt and Northern Plains. Some regional changes in cropland used for crops represent year-to-year fluctuations that tend to balance out over time, but other areas (e.g., the Northeast, Southeast, and Mountain regions) have experienced clear long-term declines. Urban pressures and a comparative disadvantage in cropland profitability resulted in the conversion of cropland to alternative, more profitable uses in these regions.
Even when cropland acreage appears relatively constant at a national level, the mix of crops produced changes in response to market forces and policy changes. For example, wheat acreage has declined 52 percent from its historic high in the early 1980s, a trend attributable to a variety of factors, including a reduction in the relative profitability of wheat due to increased foreign competition, CRP participation in wheat-producing areas, and genetic refinements to corn and soybean varieties that allowed these crops to be planted in areas previously used primarily for wheat. In contrast, soybean acreage has more than doubled since the 1960s, primarily as a result of strong international demand, while corn acreage has also risen in recent years in response to policy-induced biofuel demand.
The following ERS reports cover these topics:
- Major Uses of Land in the United States, 2012
- Land Use, Land Cover, and Pollinator Health: A Review and Trend Analysis
- Climate Change, Water Scarcity, and Adaptation in the U.S. Fieldcrop Sector
- Agriculture's Supply and Demand for Energy and Energy Products
- Changing Structure, Financial Risks, and Government Policy for the U.S. Dairy Industry
- Major Uses of Land in the United States, 2007
- The Ethanol Decade: An Expansion of U.S. Corn Production, 2000-09
- Grassland to Cropland Conversion in the Northern Plains: The Role of Crop Insurance, Commodity, and Disaster Programs
- The Role of Conservation Programs in Drought Risk Adaptation
- Targeting Investments To Cost Effectively Restore and Protect Wetland Ecosystems: Some Economic Insights
- Agricultural Productivity Growth in the United States: Measurement, Trends, and Drivers
- The Changing Organization of U.S. Farming
- Multi-Cropping Practices: Recent Trends in Double-Cropping
Links to key land-use data sources:
- Major Land Uses Data Series: Starting in 1945, and published about every 5 years since, coinciding with the Census of Agriculture.
- Maps and State rankings in data visualizations from the MLU series.
- Land Use and Land Cover Estimates: This overview of land use and land cover data sources provides details on the definitions, coverage, and methodologies by different U.S. Government agencies.
- NASS Quick Stats: Access to Ag Census and other National Agricultural Statistics Service data. Choose "AG LAND" under the Commodity selection to get started.