Mazarura U. Exploring the Influence of Coal Rubble and Pine Bark Substrate Mixes on Germination, Spiral Rooting, Substrate Chemical and Physical Properties: Using Tobacco as Test Crop . 5005 [Internet]. 2013 Mar. 14 [cited 2024 Jul. 17];3(3):115-26. Available from: https://archive.aessweb.com/index.php/5005/article/view/669