Yes, you may observe for the fertilizers seeds and insecticides license. It`s a huge  advantage for you that in case you carried ou t for the license after finishing your diploma. If you're pursuing BSC of agriculture in fisheries and veterinary then you aren't definitely capable of observe for license. Below is a link where you can apply for the fertilizers seeds and insecticides license.

Agricultural Licence| National Portal of India (https://www.india.gov.in/topics/agriculture/agricultural-licence)

Please copy paste it into another tab to open it. Hope this helps you out. All the best.