Peculiarly pleasant weather for US maize.

Area of Science:

• Agricultural Science
• Climate Science
• Agronomy

Background:

• Global food security relies on sustained crop yield increases.
• Climate change poses a significant risk to future crop production.
• Understanding historical climate-yield interactions is crucial for adaptation.

Purpose of the Study:

• To analyze the impact of weather shifts on US maize yields since 1981.
• To quantify the contribution of climate trends and farmer adaptation to yield changes.
• To assess the role of temperature and growing season length on crop productivity.

Main Methods:

• Utilized a crop model that differentiates temperature effects by magnitude and growth phase.
• Analyzed historical weather data and US maize yield trends from 1981 onwards.
• Quantified farmer adaptation rates in response to changing climate conditions.

Main Results:

• US maize has benefited from weather shifts since 1981, primarily due to longer growing seasons and reduced extreme heat.
• Farmer adaptation to changing climate has been statistically significant, averaging 13 kg·ha⁻¹·decade⁻¹.
• Improved weather conditions account for 28% of the observed US maize yield trends since 1981.

Conclusions:

• Recent climate trends have positively impacted US maize yields.
• Farmer adaptation strategies are crucial for mitigating climate change effects on agriculture.
• Future yield sustainability depends on continued climate improvements and adaptive farming practices.