Contributions of the Khmer empire to Asia?

The answers to this question are as follows. The Khmer empire contributed Buddhism and Hinduism to Asia. The Empire was known for its strong Buddhism-Hinduism influences with regards to religion. They also made advances to agriculture in Asia. The Ancient Khmers were heavily dependent on rice cultivation. The farmers who occupied the majority of the kingdom's population planted rice near lakes, rivers, irrigated plains surrounding the villages, and lowland infiltrated hills. Paddy fields were irrigated by large and complex hydropower systems including canals and valley networks, huge reservoirs.