Hello Dear,

It keeps on changing every year, it mainly depends on the total number of repeaters and the total number of fresh candidates in that particular year. But for instance i would tell that the minimum marks you require is around 130 - 140 out of 180 and since you are a general merit student so you have to get at least 140+.

Http://kea.kar.nic.in/cutoff/agri_cutoff_2020.pdf (http://kea.kar.nic.in/cutoff/agri_cutoff_2017.pdf)

Good Luck