Some of the good colleges come under icar in Tamil nadu

• Imayam institute of agriculture and technology, Trichy
• Kumaraguru institute of agriculture, Erode
• Tamil Nadu agricultural university, agricultural college and research institute, Coimbatore
• Horticultural college and research institute for women, Thiruchirapalli
• Horticultural college and research institute, Coimbatore
• RVS agriculture college, Thanjavur
• RVS padmavathy college of horticulture, Dindigul
• Tamil Nadu agricultural university, Coimbatore
• Anbil dharmalingam agricultural college and research institute, Thiruchirapalli
• Thanthai roever institute of agricultural and rural development, Perambalur
• Agricultural college and research institute, Madurai
• Agricultural college and research institute, Thoothukudi

Basically icar syllabus is based on 12 class  NCERT  book

There is link in below which give details about exam

https://www.google.com/amp/s/university.careers360.com/articles/icar-aieea-exam-pattern/amp