Thank you for your question.
Forest land can indeed be a good financial investment - especially in light of the trend towards Carbon Credit trading.
I could go into a long diatribe about silvicultural treatments and natural and artificial reforestation, but I'm going to save you the jargon-laced reply. My recommendation to you it to contact a respected and experienced professional forester who has first-hand knowledge with the specific forest land you want to invest in. If the land is in Ontario, contact the Ontario Ministry of Natural Resources and/or the Ontario Professional Foresters Association http://www.opfa.ca/
If the land is not in Ontario, maybe Quebec, then simply contact http://www.mrnfp.gouv.qc.ca/english/forest/
A professional forester will be able to answer almost all your questions regarding the investment and management of the property. Your best bet will probably be a professional consulting forester whom you will need to hire.