Increases nutrient and enegry output of Forest squares
Increses Psych at base by 50% and Economy at base by 50%
Combined with Tree Farm , eliminates the ecological
damage caused by terraforming
Cumulative with Tree Farm
The Hybrid Forest is a late game companion to the Tree Farm improvement. You must have a Tree Farm in the base before you can build a Hybrid Forest.
The great thing about the Tree Farm/Hybrid Forest combination is the way they support multiple development strategies. If you want to plant a lot of forests and just sit on them, these facilities combine to make the forests productive enough to support a large base. However, if you just want to concentrate on farms, solar collectors and more exotic improvements, Tree Farms/Hybrid Forests work together to eliminate the ecological damage the improvements create. When combined with thier other benefits there's just no reason not to build them.