Making Green Revolutions: Kansas Farms, Recovery, and the New Agriculture, 1918-1981.

The literature on the Dust Bowl conveys the impression of widespread exodus from the Great Plains. But farm populations were often more resilient than the iconic photographs of the era suggest. While recent studies highlight that tenacity, less is known about the process of recovery and postwar growth. This paper offers a window on both. The evidence discussed here survives as a legacy of a long-lived, state-run agricultural statistics program in Kansas. The State Board of Agriculture conducted annual household surveys of farms between 1873 and 1981. Linked together over time, these farm-level surveys offer a detailed record of the residential and land-use histories of three communities, and they begin to illustrate how farm households met the challenges of the drought years and adjusted to the new agriculture in the post-World War II era.

Migration in the 1930s: Beyond the Dust Bowl.

This paper analyzes in detail the role of environmental and economic shocks in the migration of the 1930s. The 1940 U.S. Census of Population asked every inhabitant where they lived five years earlier, a unique source for understanding migration flows and networks. Earlier research documented migrant origins and destinations, but we will show how short term and annual weather conditions at sending locations in the 1930s explain those flows, and how they operated through agricultural success. Beyond demographic data, we use data about temperature and precipitation, plus data about agricultural production from the agricultural census. The widely known migration literature for the 1930s describes an era of relatively low migration, with much of the migration that did occur outward from the Dust Bowl region and the cotton South. Our work about the complete U.S. will provide a fuller examination of migration in this socially and economically important era.

Adapting North American wheat production to climatic challenges, 1839-2009.

The Intergovernmental Panel on Climate Change projects that temperatures in the major grain-growing areas of North America will rise by 3-4 °C by 2100. Such abrupt changes will create major challenges, significantly altering the area suitable for wheat. The historical record offers insight into the capability of agriculture to adapt to climatic challenges. Using a new county-level dataset on wheat production and climate norms, we show that during the 19th and 20th centuries North American grain farmers pushed wheat production into environments once considered too arid, too variable, and too harsh to cultivate. As summary measures, the median annual precipitation norm of the 2007 distribution of North American wheat production was one-half that of the 1839 distribution, and the median annual temperature norm was 3.7 °C lower. This shift, which occurred mostly before 1929, required new biological technologies. The Green Revolution associated with the pioneering work of Norman Borlaug represented an important advance in this longer process of biological innovation. However, well before the Green Revolution, generations of North American farmers overcame significant climatic challenges.