Dutch to English Other calf manure (!)

this is a column category in a graph on fecal digestibility of wheat flour for calves - I have found various options on Eurodic, but am not sure if the exact term in this context is "total solids," "dry solids," or "dry matter"? My instinct says "dry solids" but I would appreciate confirmation/denial from someone with experience in this area (heaven help you). The other two categories on the graph are starch and protein if that helps.....TIA!