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A: Correlation between cattle stock and area of permanent meadows and pastures in Europe, EU27 (excl. Romania), correlation coefficient: 0.86. B: Correlation between pigs stock and area of cereal production in Europe, correlation coefficient: −0.83. C: Correlation between poultry stock (chicken and turkeys) and area of cereal production in Europe, correlation coefficient: −0.86. 1961–2008, [21,34].
