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US Cereal Yield vs US Forest Area
US Cereal Yield and US Forest Area correlate at r = +0.91 over 34 years (1990–2023), p < 0.0001. With the time trend removed, r = +0.03. Likely spurious (shared time trend).
Verdict: Likely spurious (shared time trend). Both series mostly just trend over time. After removing that trend the correlation collapses to 0.03 — the relationship is probably coincidental, not causal.
- Pearson r
- +0.91
- p-value
- < 0.0001
- Years compared (n)
- 34 (1990–2023)
- 95% confidence interval
- 0.83 to 0.96
- Correlation with the time trend removed
- +0.03
Sources
- US Cereal Yield (kg per hectare): World Bank. US Cereal Yield (World Bank indicator AG.YLD.CREL.KG).
- US Forest Area (% of land): World Bank. US Forest Area (World Bank indicator AG.LND.FRST.ZS).
Related pairs
- Atmospheric CO₂ (Mauna Loa) vs US Cereal Yield (r = +0.98)
- US Forest Area vs US Mobile Subscriptions (r = +0.98)
- US Cereal Yield vs US Population (r = +0.97)
- US Forest Area vs US Resident Patent Applications (r = +0.97)
- US Adult Obesity vs US Forest Area (r = +0.97)
- US Cereal Yield vs US GDP per Capita (r = +0.97)
Correlation does not imply causation. How the verdict is worked out.