Correlation analysis results Phenological phases BBCH_11 and BBCH_65 show a strong correlation especially with temperatures in February (Table 3 ), the only month in which a significant trend emerged with rising maximum and minimum temperatures over the study period.
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Tree responses and temperature requirements in two central Italy phenological gardens.
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Phenological phase trends and heat accumulation Regarding the trends of phenological phases and heat accumulations (GDD7 and GDH) related to the Rieti area (Table 4 ), we show, for phase BBCH_11, a negative trend in all species, except for Salix s .