The data on spring-harvested tubers were then in accordance with
levels given by Seljåsen and Slimestad (2007). The differences can
be attributed to several factors such as variety, growing conditions,
harvest time and maturity. There were no significant (p > 0.05) differences
in the TP content between varieties of raw and boiled tubers
in our study, but the content was lower in spring than in
autumn (Table 3). The content of TP was higher in boiled than in
raw tubers.