A collaborative project between linguists and environmental scientists has successfully used AI-driven multispectral imaging to read a 7th-century 'Pallava-Grantha' palimpsest. The underlying text, which had been erased and overwritten, contains a lost Sanskrit treatise on lavana-samshodhana or soil salinity management. This document provides the first recorded evidence of advanced hydrological engineering specifically designed to reclaim coastal wetlands for agriculture in ancient South India.
The manuscript details the use of specific plant-based filters and multi-layered stone filtration beds to leach salt from the earth, allowing for the cultivation of specialized rice varieties. Environmental archaeologists state that these techniques allowed the Pallava dynasty to sustain large urban populations in environments previously thought to be agriculturally marginal. The study highlights the sophisticated intersection of chemistry, botany, and engineering in the early medieval period.