Water as the source of all life in nature - learn water management to use available natural water efficiently
Without water no agriculture - hence water management, the art of using water in a steady flowing way from top of the mountains down to the river in the valley is the key in a successful mountain agriculture.
Rice terraces need to be exactly level - water is collected on the highest most possible point and then conducted by various natural but highly sophisticated means such as hollow logs, bamboo as a water pipe or stone made aqueducts are applied to use the available water in the most efficient way - i.e. with the smallest possible loss of water due to leakage on the way from top to bottom of the valleys.