Effect of ultrasonic power on soil organic carbon fractions
Ultrasonic dispersion is a prevalent tool for soil fractionation. It is widely ignored that variation in ultrasonic power might lead to significantly different dispersion.We evaluated the effect of power variation with constant energy on the fine fraction mass, its organic C content and quality. All parameters increased significantly with power. The term stable aggregates as used in fractionation schemes cannot be defined by ultrasonic energy alone but power needs to be standardized, too.