Pengaruh Lamanya Pengomposan Pada Media Tanam Dengan Penambahan Em-4 Terhadap…

This study aims to determine the effect of composting on planting media with the addition of EM-4 to the growth of oyster mushrooms (Pleurotus ostreatus) and produce learning resources in the form of learning videos in class XII high school biotechnology material. This research was conducted at the Biology Mushroom House Laboratory of Biology Education FKIP UNRI in May-December 2019. This resea…