Variable	Explanation
Diet	"type of feed substrate: CF = chicken feed, CM = chicken manure, CS = camelina"
Batch	"batch of chicken manure (1 and 2 are from Day 1 in larval experiment, 3 and 4 are from Day 2 in larval experiment), not relevant for chicken feed and camelina (freshly prepared for pH measurement)"
Replicate	"replicate subsample within a freshly prepared diet"
Day	"time point, day 0 because condition is comparable to onset of larval experiment (but not the same timeline), i.e. chicken feed and camelina freshly prepared and then measured for pH, and reference samples of the chicken manure batches (used in the larval experiment) were stored at -21 C and defrosted 1 year later for pH measurement"
pH	"pH value of substrate"