Between them: plant health and propagation, soils and manure, rainfall and season, irrigation and tanks — with the Arthashastra adding the state chapters on forests, groves and water works.
Vrikshayurveda
Dates disputed for both texts · disputed · disputed
Both attributions are traditional and their dating uncertain
Unknown or disputed.
Environmental studies · CBSE · ICSE · IGCSE · IB · State — Vrikshayurveda, Jala-vijnana and Ritucharya. Water harvesting and tanks, forest and grove protection, soil and season, living within a cycle rather than against it.
Evidence: traditionally attributed · no modern scholarly reference recorded yet.