Dear aspirant, 

An agriculture engineer wroks with the professional design and test agricultural machinery , equipments and parts. They have the ability to design a plant , food storage and food processing plants . They also have an idea about the most important issues like water quality and pollution control . As per study about 12 % of India's population work in agricultural industry.  The agricultural engineer works even in classrooms and laboratories . The entry level jobs starts from RS. 3.5 LAKHS per annum , but it depends on your skills and knowledge ,the salary may vary . 

So yes you can become an agricultural engineer if you have the passion of pursuing it . 

Get an admission into a good university , which will help you to become a professional in this field . 

Your overall percentile will increase because you have got more marks in state board examination. So, dont worry about that , check the cut off for the good colleges and apply there , check even the contents of the syllabus which will give you an idea whether to study the field or not .

Hope it will help you.

Dear aspirant,

You can take the help of college predictor. I'm providing you the link in which you have to fill in the basic details like your rank, category etc. After submitting the details you will get the list of colleges which are open for you according to your rank. 

https://engineering.careers360.com/jee-main-college-predictor

All the best for your next journey..!!