sakdi na

The Sadki Na grades were a system of land tenure established in Thailand by King Trailok in 1454. This reform aimed to regulate land ownership and centralize governmental control. The Sadki Na grade, representing a person's dignity marks, determined their rank and the amount of land they could own, ranging from 10 acres for the lowest class to thousands of acres for the highest officials.1

This system provided a social framework, influencing legal fines and compensation. It ensured that even the lowest class had a minimum of 10 acres, preventing starvation. The grades also determined the income of government officials, as salaries were not introduced until the 19th century. The Sadki Na institution contributed to a stable economic and social order in Siam.1