Science

Science is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe. In modern science, it is regarded as good scientific practice to aim for principles such as objectivity and reproducibility, which means that improvised methodology or bizarre interpretations should be downplayed, at least unless the scientist rightfully suspects a paradigm change.

For both, Indian council of Agricultural Research (ICAR) organised AIEEEA Exams. For horticulture, HORTI-CET exam is the best in India. Date of AIEEA UG 2018 exam: Third week of June 2018
Online counselling shall start from: First week of July 2018. I think search in web.

You can take admissions in Delhi University. You can apply online on their website. Important dates regarding 2018 admission will be published on website and cut-off will be available in the month of May after class 12th results. According to the cut-off and choices filled, you can visit the campus on the respective dates for admission.

Yes, you can do it without maths in 10+2 also. Good luck!