This document provides an overview of relevant methods for the determination of specific parameters in solid soil improvers, including: dry matter content; nitrogen content; P2O5 and K2O content; chloride, copper and zinc content; quantity. This document is applicable to solid EU fertilizing products classified as PFC 3 and PFC 7 as long as the main function of the EU fertilizing product is classified as PFC 3 of Regulation (EU) 2019/1009 [2].