USA

You should try to do some work that considered as a work like professional. I am suggesting you to get any other professional work experience. Thank You!

Dear Anusuya, Ph.D. entry is little different in USA as compared to India. However, if you are passionate and focused then you can easily get the entry. Just make these things ready and start applying.
1. Select your area of interest
2. Prepare a workplan/SOP according to that consulting existing literature about the topic.
3. Clear GRE/TOEFL/IELTS anyone.
4. Write emails to the faculty/scientist regarding your willingness to join and your cover letter highlighting your workplan.
5. You can apply for different scholarships after getting confirmation from your host guide. Hope this will help you.

Jobs directly related to your degree include:
Agricultural consultant
Estates manager
Farm manager
Fish farm manager
Plant breeder/geneticist
Rural practice surveyor
Soil scientist
Jobs where your degree would be useful include:
Amenity horticulturist
Commercial horticulturist
Field trials officer
Forest/woodland manager
Horticultural consultant
Magazine journalist
Newspaper journalist
Sales executive.