Hii Hitha!
The two fields are vast together as well as apart.
Various courses related to botany or agriculture are-
BSC, MSC, PhD, agronomy, ecology, horticulture, floriculture, plant breeding, agriculture geneticist, researcher, forestry, hydroponics, bacteriology, dendrology, bryology, algology, agrostology etc.,  The list doesn't end. You can choose to Study whatever you are interested in.
Hope this helps.
Good luck!