The Influence of Effective Microorganisms on the Growth and Nitrate Content of Vegetable transplants Take home message Cucumber, pumpkin and squash transplants were shorter, stem diameter was greater in effective microorganisms treatment compared to control. Cucumber, pumpkin and squash transplants contained less nitrates in effective microorganisms treatment compared to control. To learn more please read: Olle, M. 2021. Best effective microorganisms practices in greenhouse plant production (hard cover). USA: Amazon Media EU S.à r.l. 99p. Go and grab Your book here.