I have recently completed my Masters (M.Phil.) in Plant Sciences from Pakistan. I am preparing my application for several universities around the world. My focus is on Scholarships announced by China, Saudi Arabia and United Kingdom. I need to prepare a research proposal related to Plant Science. Any suggestion or advice from experienced PhD Scholars would be appreciated. I'm interested in following fields: Biodegradation, Phytochemicals, Ethnobotany, Medicinal Plants, Conservation or Forest Ecology.
Thanks.

I think you need to be more specific on what advice you want.

I think the first thing you need to do is to find a potential supervisor. Your proposal is valuable only it matches well with your supervisor's project.
Best of luck.
Jasmine