How to do a Ph.D. subject about a regional test of new plant species?

I would like to obtain a doctorate in forest cultivation。The research is about a regional test of new plant species ,but now I find there have little research paper in the Springer or other websites .I want to know how the introduction of plants abroad, the specific procedure is what? Do not they carry out adaptive tests?

last I want to some research paper about introduction or regional test .

Similar questions and discussions