What substance found in turkey is known for making you sleepy?

amino acid tryptophan

Contrary to popular belief, eating turkey isn't the main reason you feel sleepy after a Thanksgiving feast. The oft-repeated turkey myth stems from the fact that turkey contains the amino acid tryptophan, which forms the basis of brain chemicals that make people tired

good one: produce hormones that plants grow.

bad one: the problem with organic matter is that while plant nutrients are needed for crop growth, they can also stimulate excessive growth of the wrong plants – mainly, algae.