1.
Puspita sari N, Iman Santoso T, Mawardi S. Distribution of Soil Fertility of Smallholding Arabica Coffee Farms at Ijen-Raung Highland Areas Based on Altitude and Shade Trees. PP [Internet]. 2013Aug.31 [cited 2026Apr.27];29(2). Available from: https://www.ccrjournal.com/index.php/ccrj/article/view/57