The AIEAA ICAR UG exam is divided into 2 streams. The books you need to prepare from are:

NTA-ICAR: AIEEA-UG Entrance Exam Guide by R.Gupta

ICAR Syllabi B.Sc Agriculture by Dr. Rajeev Bairathi and R.K.Gupta

Ready Reckoner for ICAR-AIEEA UG by R.K.Sharma and U.D.Chavan

B.Sc Agriculture for ICAR AIEEA UG by Dr. Lalita Gaur

ICAR AIEEA-UG by R.Gupta

B.Sc Agriculture Entrance Exam 2020 by Arihant

General Agriculture for ICAR by Jain Brothers

B.Sc Agriculture Entrance Exam by Dr. Lalita Gaur

ICAR Exam by Edugorilla