Maize Yield and Planting Date Relationship: A Synthesis-Analysis for US High-Yielding Contest-Winner and Field Research Data.

Front Plant Sci · 2017 · PMC5743010 · PMID 29312377

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an overall trendno p-value reported

Focused on 12 central Corn Belt states, Kucharik (2006) found an overall trend for a 2-week earlier initiation of maize planting date in 2005 compared to early 1980s.

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