Tree Alley (image) Penn State Share Print E-Mail Caption Agroforestry, on average, stores markedly more carbon than agriculture, researchers found. Here, alley cropping walnut and soybeans is shown in Missouri. In the United States, agroforestry is lauded for its environmental benefits; in the tropics its economic benefits are seen as in dispensable. Credit USDA National Agroforestry Center Usage Restrictions Non commercial use only Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.