Yield Performance of Corn Under Heat Stress: A Comparison of Hybrid and Open-Pollinated Seeds During a Period of Technological Transformation, 1933-1955

Meyers, Keith; Rhode, Paul W.

doi:10.2139/ssrn.3615488

Cited by 1 publication

(1 citation statement)

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“…At the start of hybrid and crop management technology from 1930 to 1970, maximum corn yield variability decreased to ±0.9 Mg ha −1 . Perhaps, commercial hybrids and improved agronomic practices initially decreased corn yield variability (Meyers & Rhode, 2020). However, in the recent years 1970-2020s, maximum corn yield variability from one year to another increased significantly to ±2.0 Mg ha −1 , which is the greatest of the three-time series.…”

Section: Corn Yield Variabilitymentioning

confidence: 98%

Historic corn yield, production, and economic value trends in Kansas

Holman,

Obour,

O'Brien

et al. 2024

Agronomy Journal

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World corn (Zea mays L.) production has tripled since the 1960s. However, without new breakthrough innovations the trend is expected to plateau or decrease in the future. The objective of this study was to quantify Kansas corn production, economic value, productivity, annual production variation, yield gap trends, and in due course, identify future areas for research. Corn variety performance tests and United States Department of Agriculture (USDA) data were used for this study. Results showed that the area planted to corn in Kansas increased from 0.5 million in 1880s to over 2 million ha by 2022, with an increase of 0.05 million ha year−1 between 1984 and 2022. The value of corn produced in Kansas also increased significantly from below $1 billion annually prior to 1990s to the current value of approximately $3–$4 billion. The average corn yield gain from 1972 to 2000 was 132 kg ha−1 year−1, which declined to 12 kg ha−1 year−1 during 2000 to the early 2020s. Also, a relatively high yield variability occurred from 1970 to the early 2020s compared with earlier years (1866–1970), and a 42%–68% gap between the potential and actual corn yields was identified. We concluded that there is a decrease in the rate of corn yield increase and developing farmer awareness and their adoption of new corn production technology, increasing longevity of the Ogallala Aquifer, and integrated research should be priorities to avert the decreasing trend of corn productivity and further increase corn economic value.

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Section: Corn Yield Variabilitymentioning

confidence: 98%