TREE CROP INTERFACE (TCI) Pos + neg inter. POS: Micro-climate amilioration Weed suppression Soil & water conversation Biomass & shading NEG: Light, water, nutrients completion Tree Animal Interface A. Pos. -shade of -manure -fodder B. Neg. -low quality fodder/tree -soil compaction because of trampling Commensalism 1 organism benefits from others without harming. Mutualism Two organisms benefitting from other Amensalism which one species is harmed or impeded and the other is unaffected. Paratism One benefitting and harming other Neutralism No effects at all Facilitation One species has positive effect but no contact Autoallelopathy Kiling of offspring plant by mother