Applying such knowledge of temperature responses to new growing regions raises an important issue of data availability and interpretation. Temperature records from meteorological stations in mountainous, or even hilly, areas do not have wide geographic application and so much be utilized with caution. This applies especially to estimates of chilling requirements and cold tolerance. Examples are seen in the recent experience in Argentina where hedgerow plantings have extended into pre-Andean valleys in L Rioja and Catamarca (latitudes 27-31 S, altitude 350-1400 m). There, frost damage, flowering intensity of some cultivars, and oleic acid content in the oils of others have shown great variability. While calculations based on meteorological data using chilling models such as that of (De Melo-Abreu et al. 2004) have successfully predicted flowering in many instances, failures have also been recorded over short distances due to topography.