Try again later, or contact the app or website owner. The results of Experiment 1 carried out by Boyd and Van Acker 2004 revealed that oxygen concentration of 21 highest led to 31, 29, and 61 increased germination of Elymus repens L. And we ll start with the question that likely brought you here the light requirements. Source: https://www.furry-paws.com/kennel/about/1682370