Morales-Maldonado, Emilio, and Fernando Casanova-Lugo. “Mixtures of Organic and Inorganic Substrates, Particle Size and Proportion.”. Agronomía Mesoamericana 26, no. 2 (June 16, 2015): 365-372. Accessed December 5, 2021. https://revistas.ucr.ac.cr/index.php/agromeso/article/view/19331.