Agriculture

Yes, seed technology is very much a part of agriculture studies. Please refer to the link provided below for details regarding seed technology.
Link:
http://www.icar.org.in/en/node/9061

Check the link provided for all the college details for B.Sc in Agriculture:
https://www.shiksha.com/science/colleges/b-sc-agriculture-colleges-maharashtra

To prepare for the exam:
1. You must know the paper pattern and the marking scheme.
2. Know the complete syllabus
3. Be aware of the cut-off marks
4. Must know the important topics for the exam
5. Buy top notch reference books and study material
6. Solve previous years question papers and take online mock test

You may search for B.Sc in agricultural model papers in your university/institution, educational portal /web and app/web page. For example: If you belong to Kumaon University then you may go to www.kuexam.ac.in or www.kunainital.ac.in.

Yes, B.Sc (Hons) in agriculture has a very bright future.

Some of the popular courses you can pursue abroad after completion of B.Sc. agriculture are as follows:
1) Agriculture and Veterinary Medicine
2) Applied and Pure Sciences
3) Architecture and Construction
4) Business and Management
5) Computer Science and IT
6) Creative Arts and Design
7) Education and Training
8) Engineering
9) Health and Medicine
10) Humanities
11) Law
12) MBA
13) Personal Care and Fitness
14) Social Studies and Media
15) Travel and Hospitality

Please refer to the link mentioned below which allows for rank and cut off prediction for entrance exam in B.Sc Agriculture(KCET):
https://www.shiksha.com/b-tech/resources/kcet-cut-off-predictor

Scope for higher studies after B.Sc. in Zoology
After completing their graduate degree in B.Sc. Zoology candidates have tremendous opportunities for their higher studies. Various higher study options after B.Sc. Zoology are
Master of Science in Zoology
Master of Science in Applied Zoology
Master of Science in Zoology (Honors)
Master of Philosophy in Zoology
Master of Philosophy in Life Science
Doctor of Philosophy in Zoology
Master of Science and Master of Philosophy in Zoology
Post Graduate Diploma in Life Science
Doctor of Philosophy in Life Science
Master of Business Administration
Post Graduate Diploma in Life Science

Yes you can pursue courses in agriculture with your qualifications. Moreover, since you have completed your Masters and Bachelors, it should give you the edge over other competitors.