Hello Aspirant,

For BSc Agriculture/Horticulture it is not necessary that you appear for ICAR. However it is advisable that you do, as the competition is high and having a good score on the entrance exam could increase your chances. Most if not all top colleges that offer BSc agriculture/horticulture are ICAR Accredited. The top colleges are

Tamil Nadu national agricultural university

Anvil Dharmalingam agricultural college and research institute

Horticultural college and research institute

Hope this helps and Good luck