What were the Jat agitations i've seen you guys mention?
Jats are a middle caste, involved in farming, and unlike lower castes they hold land.* In parts of Western UP and Haryana, they are the politically dominant group. However, many young Jats do not see a future in farming, especially after seeing their neighbours get rich when the expansion of Delhi (Gurgaon) meant their farmland was bought at high prices for building new apartments. Many of them were born rich enough to go to college, but the job market for most degree-holders sucks (and so does the quality of most degrees).
So, they are agitating for reservations. Reservations in college admission and govt jobs were started for SCs (Dalits) and STs (Tribes) after independence. In ~1990 they were expanded to OBCs (Other Backward Class) after a report (Mandal Commission) showing the lack of representation of these groups in govt jobs. Of course this has led to mass unrest among the castes above them.
With slowing job growth, protests started by these intermediate but politically strong castes - Marathas in Maharashtra (measuring it politically, every CM of Maharashtra has been a Maratha from the 60s till 2014), Patels in Gujarat, and Jats in Haryana, demanding reservation as part of OBC category.
In the Jat agitation in Haryana, Jats rioted, and did extensive damage to railways and other property for several days. To measure how strong these groups are, consider that they
attacked the police and sitting MPs, which for weaker groups usually means police firing and death. The govt formed a committee to look at including them as OBCs, which ended that violence more or less. 12 people died. Same happened (I think with less violence) with Marathas, it ended after an assurance from the CM that he will implement the changes. Patels had a long violent agitation, their leader is now in jail, I am not sure how it was ended (probably they have a committee too).
*This is my impression, I could be wrong.