Hello aspirant,
I am here for helping you.
Your concern was about entrance test to get admission in M.Sc agriculture .
So, answer is yes , there are several entrance tests to get admission in M.Sc agriculture in many colleges some of the links are given below where you can know about many colleges which offers M.Sc agriculture course and their eligibility criteria to take admission
1.  https://www.careers360.com/university/js-university-shikohabad/msc-agriculture-course
2. https://www.careers360.com/university/amity-university-noida/msc-agriculture-agronomy-course
3.  https://www.careers360.com/university/mahatma-phule-krishi-vidyapeeth-rahuri/msc-agriculture-course
4.  https://www.careers360.com/university/dr-rajendra-prasad-central-agricultural-university-samastipur/msc-agricultural-agronomy-course

5.  https://www.careers360.com/university/mahatma-gandhi-chitrakoot-gramodaya-vishwavidyalaya-chitrakoot/msc-agriculture-agronomy-course

6.   https://www.careers360.com/university/indian-agricultural-research-institute-new-delhi/msc-agricultural-statistics-course

I hope it will help you...
For more queries you can upvote me and can ask in the comment box.
Best of luck.