Agriculture

Please refer to the link provided for a detailed comparison between the colleges mentioned in the question above. You should be able to use the filters to navigate and compare different colleges offering a course in B.Sc. agriculture.
Link: https://www.shiksha.com/science/colleges/b-sc-agriculture-colleges-india

Scholarships are normally awarded to students who do well in their studies. You should check with your institute if you are eligible for scholarships in your current set-up. Also, visit the official web page of your institute and download their brochure which should be able to tell you details regarding scholarships at your institute.

Yes, there are courses offered by Anna University in B.Sc. (Agriculture). Institute(s) offering courses in B.Sc Agriculture in Anna University, Chennai is:
College of Engineering- Anna University (CEG, Guindy), Guindy, Chennai

Candidates should have good knowledge in Science and be familiar with crops, pastures, soil types agricultural and horticulture chemicals. Other essential skills are good observation, communication skill, organizing skills, written and oral skills, ability to give presentations and knowledge of common business trends.

Please refer to the link provided below for a list of colleges which offer M.Tech agriculture and related courses. You can download their brochure and check if distance courses are offered by the institute:
https://www.shiksha.com/engineering/colleges/m-tech-agriculture-farm-engineering-colleges-india