Simplify the following text for a Grade 11 native English-speaking person.
Original: Determination of non-stigma content ( `` floral waste content '' ) and other extraneous matter such as inorganic material ( `` ash '' ) are also key .
Simplified: Other metrics include floral waste content ( i.e. the saffron spice sample 's non-stigma floral content ) and measurements of other extraneous matter such as inorganic material ( `` ash '' ) .