Yasin, S., Adrinal, ., Junaidi, ., Wahyudi, E., Herlena, S. and Darmawan, . (2018) “Changes of Soil Properties on Various Ages of Rubber Trees in Dhamasraya, West Sumatra, Indonesia”, JOURNAL OF TROPICAL SOILS, 15(3), pp. 221–227. doi: 10.5400/jts.2010.v15i3.221-227.