The use of Indonesian selective cutting and planting (TPTI) system on the management of dipterocarp forests, in Indonesia, is based on the potency of natural regeneration (saplings and poles) and prospective young trees of commercial tree species for the development of full stocked stands. Studies were conducted on the existing saplings, poles and prospective young trees of commercial tree species on the remaining forest stands 3-5 years after selective cutting in some dipterocarp forests in Sumatra and Kalimantan. Result showed that the dipterocarp forests after selective cutting system have more than 400 saplings/ha of commercial trees, including more than 100 poles/ha of dipterocarp, 30-85 poles/ha of commercial trees and 26-68 mother trees/ha. Therefore, the number of healthy growing saplings, poles and prospective young trees of commercial species were adequate to the development of fully stocked stand. Since they are not evenly scattered over the forest areas, enrichment plantings on empty areas were needed. Silvicultural treatments such as growing space, improvement for saplings and poles as well as protection of forest stands against illegal cutting, forest encroachment and forest fire are necessary.
