This 87-page comprehensive technical manual is an official guide prepared by Cambodia's Department of Agricultural Engineering. It focuses extensively on water management and irrigation practices tailored for local agriculture. The manual serves as a practical blueprint for farmers, agricultural students, and technicians. It likely covers fundamental concepts of sustainable water usage, the design and maintenance of various irrigation infrastructure (such as drip, sprinkler, or surface irrigation), efficient water distribution strategies to optimize crop yields, and methods for dealing with water scarcity or environmental changes in Cambodia's agricultural regions.