is similar to the current jungle rubber system, in which unselected rubber seedlings are replaced by adapted clones.
is a complex agroforestry system in which rubber and perennial timber and fruit trees are established after slashing and burning, at a density of 550 rubber and a range of 90/250 other perennial trees per hectare.
planted only in West Kalimantan, is also a complex agroforestry
system with rubber and other trees planted at the same density as that as in RAS 2, but with no 5 intercrops except in the first year, followed by a combination of leguminous cover crops, and Fast Growing Trees (FGT).