I did a project last year where I used pine pitch. The goal was to find out what could be added to make the glue the strongest. My vairables were plain pine glue, glue with ashes, glue with coal, glue with eggshells. I tested this on a wood joint. Good idea, and got a A on it.
Before I did one where I grew bean plants, but put gas, diesel, chainsaw oil in the soil before. also A