Related Experiment Video
Updated: Jul 31, 2025

Imaging and Analysis for Quantifying Maize (Zea mays) Abiotic Stress Phenotypes
Published on: March 28, 2025
Changes in the drought sensitivity of US maize yields
David B Lobell1,2, Jillian M Deines3,4, Stefania Di Tommaso4
1Department of Earth System Science, Stanford University, Stanford, CA, USA. dlobell@stanford.edu.
Climate change increases crop yield sensitivity to drought. Despite yield gains, maize in the US is now 55% more sensitive to soil water storage, highlighting adaptation challenges.
Area of Science:
- Agricultural Science
- Climate Change Adaptation
- Agronomy
Background:
- Climate change intensifies drought, impacting crop yields globally.
- Reducing crop yield sensitivity to drought is a key agricultural adaptation goal.
- Many yield-enhancing practices inadvertently increase drought sensitivity.
Purpose of the Study:
- To evaluate empirical strategies for detecting changes in crop drought sensitivity.
- To assess trends in drought sensitivity for U.S. maize.
- To understand the impact of management changes on drought-tolerant varieties.
Main Methods:
- Applied two empirical strategies to U.S. maize data.
- Utilized weather-driven temporal variations in drought exposure.
- Exploited within-county spatial variability in drought exposure based on soil water storage capacity.
Main Results:
- Weather-driven temporal analysis of drought exposure was inconclusive.
- Spatial variability analysis revealed robust trends in drought sensitivity.
- Maize yield sensitivity to soil water storage increased by 55% across the U.S. Corn Belt since 1999.
- Drought cost relative to good weather has increased.
Conclusions:
- Spatial variability analysis is effective for detecting drought sensitivity trends.
- Despite overall yield increases, maize has become more sensitive to drought.
- Simultaneously increasing average yields and reducing drought sensitivity presents significant challenges.
More Related Videos
08:31Kinematic Analysis of Cell Division and Expansion: Quantifying the Cellular Basis of Growth and Sampling Developmental Zones in Zea mays Leaves
Published on: December 2, 2016
06:35Semi-High Throughput Screening for Potential Drought-tolerance in Lettuce Lactuca sativa Germplasm Collections
Published on: April 17, 2015
Related Concept Videos
Responses to Drought and Flooding
Adaptations that Reduce Water Loss
Light Acquisition
What is Climate?
Responses to Salt Stress
Responses to Heat and Cold Stress