For a General category student aiming to secure a seat in the ICAR AIEEA PG entrance examination in the field of Social Science (specifically Agriculture Extension), the required marks can vary depending on the year, competition, and the specific institution's cutoff trends. However, in recent years, the general trend has indicated that scoring around **300-400 marks out of 480** can provide a competitive edge for a General category student.

Since Social Science disciplines, including Agriculture Extension, may have fewer applicants compared to core agricultural subjects, the cutoff might be slightly lower than more competitive streams like Agronomy or Plant Sciences. However, it's essential to aim for a high score to ensure a better chance of admission, as the cutoffs can fluctuate yearly.

Apart from the marks, factors such as the candidate's rank, availability of seats, and performance in the interview (if applicable) also play crucial roles in final admission. To improve chances, candidates should focus on understanding key concepts in Agricultural Extension, current agricultural policies, and social science methodologies, as the examination tests both technical knowledge and general aptitude in the chosen discipline.

Keeping an eye on previous years' cutoff marks from desired institutions can help better target your preparation.