If you are willing to assess the government managing the forest, you can assess the certain parameters of efficiency, sustainability and equability. please refers to this document.

thank you for your answer, but am looking for a method that has been used somewhere that could be adopted in tropical part of Nigeria.

Dear Augustine,

You may wish to look at the research methods used in the following studies which included Nigeria and other countries:

- Community managed forests and forest protected areas: An assessment of their conservation effectiveness across the tropics -- https://www.cifor.org/publications/pdf_files/articles/AGuariguata1101.pdf

- Assessing the progress made: an evaluation of forest management certification in the tropics --- http://edepot.wur.nl/137012

- Forest governance and climate change adaptation : Case studies of four African countries --- https://helda.helsinki.fi/bitstream/handle/10138/26076/forestgo.pdf?sequence=1

- Timber exploitation rate in tropical rainforest ecosystem of southwest nigeria and its implications on sustainable forest management ---- http://aloki.hu/pdf/1101_123136.pdf

- Measuring livelihoods and environmental dependence: Methods for research and fieldwork --- Book Measuring Livelihoods and Environmental Dependence: Methods ...

Best wishes