The ocean and the oceanic region are called Nethal. The Neythal region is characterized by abundant soft soil texture and salinity. A growing ecosystem that thrives on back water, sewage, salt air, and heat is located in the Neidhal land. Especially, in the coastal environment, plants such as adumbu, thillai, punnai, gnalal, pennai, mundagam, neem, serundi etc. are found. In Sangam literature, poets have recorded botanical thoughts in hymns as a background to the literature. Through this how the ancient people lived a life in harmony with nature. It is possible to know how the plants knew the techniques of their use. The signs revealed by the poets about the salts of plants like leaf, flower, stem, branch etc. help in identification and utilization of plants even today.
Forschung (2023) studied this question.