Relation of Forest Stands to Availability of Secondary Metabolite Content in the Land (A Case Study on HPHTI PT Toba Pulp Lestari, Tbk.)

: This research was carried out in the stands of Eucalyptus plantations and stands of natural forests in the concession area of PT. Toba Pulp Lestari, Tbk, Aek Nauli Plantation. The research was carried out by purposive sampling method of soil sampling at the research sites which were considered representative of all locations involving Eucalyptus Sp planted in 2012, 2014 and 2016, located on slope 0 - 25%, and slope >25% with distance taking soil samples from Eucalyptus Sp 0 - 50 cm, 50 - 100 cm and 100 - 150 cm) with 3 replications in industrial plantations and natural forests of protected areas. The analysis result using soil samples by screening method (qualitative) demonstrated that the chemical content of secondary metabolites available in the forest consisted of alkaloid, terpenoids, and saponin, whereas those that were available in the plantation forest were only terpenoid and saponin. And there were three kinds of metabolites found in the protected areas; they were alkaloid, terpenoid, and saponin. Alkaloids were found in flat slope which distance was 50 cm from the trees, Terpenoids were found in flat and tilted slope which distance was 50 cm and 100 cm from the