Vergleichende Bewertung mikrobiologisch-biochemischer Parameter zur Qualitätsbestimmung pflanzlicher Produkte anhand von Untersuchungen zu einem langjährigen DüngungsversuchJoachimRauppauthorBased on investigations with samples of a fertilization trial started in 1980, some parameters of storage ability are evaluated. Microbial infestation of the product during incubation seems to be the most reliable parameter. But the circumstances of infestation are as unknown as the optimal test conditions. There is no reliable correlation between results of degradation tests, storage tests under optimal conditions and chemical contents of the product. The quality concept of product vitality (product-oriented), i.e. a product full of vigour, based on results of degradation tests is discussed. Ultimately, food quality standards are based on human priorities (human-oriented). Therefore, not only product characteristics, but also social, psychological, environmental etc. criteria shall be considered. Food security, food quality and human health Specific methods1997Institut für Organischen Landbau, BonnConference paper, poster, etc.