The United States is the world's leading agricultural nation despite having less than 8% of the world's land suitable for farming and less than 3% of its population involved in agriculture. The US produces about 20% of the world's wheat, corn, oats and sorghum as well as being responsible for 14% of dairy products and 17% of meat globally. Additionally, American farmers face the challenge of overproducing food and agricultural products, which has lowered prices and caused difficulties for some farmers.