全球智库信息集成服务系统(G2TT): Yield Performance of Corn under Heat Stress: A Comparison of Hybrid and Open-Pollinated Seeds during a Period of Technological Transformation, 1933-1955

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来源类型	Working Paper
规范类型	报告
DOI	10.3386/w27291
来源ID	Working Paper 27291
	Yield Performance of Corn under Heat Stress: A Comparison of Hybrid and Open-Pollinated Seeds during a Period of Technological Transformation, 1933-1955
	Keith Meyers; Paul Rhode
发表日期	2020-06-01
出版年	2020
语种	英语
摘要	Starting in the 1930s, commercial hybrid corn seeds rapidly replaced the once predominant open-pollinated varieties planted by farmers. By the mid-1950s almost all corn grown in the United States was of hybrid varieties. Observers have argued that the drought tolerant qualities of these hybrids were a major factor driving farmers’ decisions regarding hybrid adoption, but there is little statistical evidence to substantiate this assertion. Hybrid seeds exhibited other attractive qualities, such as improved performance during prime weather conditions, resistance to wind damage, and increased suitability toward mechanized harvesting. Using historical evidence from Zvi Griliches’s archival records, we reconstruct data on hybrid corn adoption and yields at a more disaggregated geographic level than previously available. We match these data with historical weather records to measure the extent to which hybrid seeds mediated the adverse effects of extreme heat. Our findings suggest that hybrid corns grown in Iowa from 1928 to 1942 did exhibit heat tolerance relative to open-pollinated varieties. This result is unique to Iowa as this reduced temperature sensitivity does not appear when comparing hybrid and open-pollinated grown in other states.
主题	History ; Macroeconomic History ; Development and Growth ; Innovation and R& ; D ; Environmental and Resource Economics ; Agriculture ; Environment
URL	https://www.nber.org/papers/w27291
来源智库	National Bureau of Economic Research (United States)
引用统计
资源类型	智库出版物
条目标识符	http://119.78.100.153/handle/2XGU8XDN/584962
推荐引用方式 GB/T 7714	Keith Meyers,Paul Rhode. Yield Performance of Corn under Heat Stress: A Comparison of Hybrid and Open-Pollinated Seeds during a Period of Technological Transformation, 1933-1955. 2020.

条目包含的文件
文件名称/大小	资源类型	版本类型	开放类型	使用许可
w27291.pdf（757KB）	智库出版物		限制开放	CC BY-NC-SA	浏览