Good results with compost use in potatoes
Till now compost is used to a limited extent in arable farming. Therefore the Research Center for Potato Cultivation (PCA vzw.), partner in Soilcom, set up a one-year compost trial in potatoe Fontane. No differences in crop development or yield were observed between the subjects with compost and the normal situation. However, the nitrate residue in the objects fertilized with compost was slightly lower on average. This shows that compost application in the fertilization strategy is possible without decreasing yield and crop quality.
Look here, for more background and the results of the trial.