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. 2013 Jul 23;8(7):e69015. doi: 10.1371/journal.pone.0069015

Figure 4. Relationships between yield (hl/ha) and mean May to August temperature (°C).

Figure 4

1805–1914 [24], [25] (black solid circles), 1915–1952 [26] (light grey solid triangles) and 1962–2010 (annual vintage records) (dark grey solid rhombs). Regression lines superimposed.