A 31 page microbe manual accompanies the poster with extremely detailed and scientific explanations of each photo on the poster, with arrows and letter labels to help clarify what you see in each photo and your microscope. This is the only reference guide on the market written by Phd's about how to add beneficial biology into plant growing systems. Doctor Elaine Ingham is the expert in this field through the world with micro biological laboratories in eight different countries she has been the world leader in the compost tea industry for over 25 years. Since there are no textbooks written on the subject this guide is the only reference the industry has available.