Plant of Teak in the humid tropics is kind of in the introduce of its original area in Java (tropical), variations of land systems in humid tropics supposed to influence the wood quality of teak produced. This study aimed to analyze the effect of the land system to the quality of teak produced in terms of the nature of physics, mechanics and content of extractive substances teak. Research was conducted on private forest teak in humid tropic regions at the age of 11 years (KU II) in Tapin and Banjar district South Kalimantan province. The research method to determine the unit of land based on land systems and to analysis of wood quality in wood quality lab, the analysis of data used analysis of variance. Research shows that there are six land system is the Tanjung land system (TNJ), lawang uwang (LWW), Okki (Oki), pendreh (PDH), Teweh (TWH) and maput (MPT). The test results and analysis of quality of teak includes physical, chemical and extractive substances of teak in humid tropic on various land system showed no difference in the physical properties of wood and wood mechanics. The quality of the wood produced in all the land system is based on the mechanics of wood with Strong class I and based on the weight of wood types including strong class II. Based on the wood extractive substances contained a significant effect between the different of the land system to extractive substances teak well on both the mesh 40 and 60. Ekstractive Substance teak lowest in Teweh and maput land system and the highest levels of extractive substances in the Tanjung land system and and levels of extractive substances approaching Tanjung land system is the Okki land system. Keywords: land system, wood quality, humid tropic.