RT Journal Article SR Electronic T1 Protecting the Breadbasket with Trees? The Effect of the Great Plains Shelterbelt Project on Agriculture JF Land Economics JO Land Econ FD University of Wisconsin Press SP 321 OP 344 DO 10.3368/le.97.2.321 VO 97 IS 2 A1 Tianshu Li YR 2021 UL http://le.uwpress.org/content/97/2/321.abstract AB Wind erosion is detrimental to agriculture. Planting shelterbelt trees is a common strategy to protect vulnerable areas. I estimate the impact of shelterbelts on agriculture while instrumenting the endogeneity of planted location with a designated zone under the Great Plains Shelterbelt Project—a massive tree-planting operation implemented in 1935–1942. I find a shift from cropland to pasture associated with higher shelterbelt coverage due to differential productivity changes in livestock and crop production. The revenue increase from livestock was contributed by cattle, while the decline in crop production mainly occurred in western counties owing to obstacles to adopting new irrigation technology.