Table 1.

Correlations of herbage growth rate with summer meteorological variables and the winter NAO between 1960 and 1999. (Herbage growth rate transformed to natural logarithm before analysis. All summer meteorological variables, except maximum PSMD, calculated as daily mean for the period between the first and second cuts. *p<0.05; **p<0.01; ***p<0.001.)

variable	raw	differenced
mean rainfall	0.388*	0.233
mean PE	−0.404*	−0.331*
mean PSMD	−0.778***	−0.726***
maximum PSMD	−0.788***	−0.760***
winter NAO	−0.472**	−0.430**