USDA Irrigation Page - Handbooks, training materials, and other resources from United States Department of Agriculture.

WWW-Virtual Library: Irrigation and related topics - Directory of Internet resources on irrigation, drought management, hydrology, and related topics.

Irrigation and Drainage Research Directory - Directory of USDA-Agricultural Research Service (ARS) irrigation and drainage research information.

The Irrigation Association - The Irrigation Association. Updates on irrigation equipment. Handbooks and tips.

Irrigation Engineering - A list of articles and online reference material, published by the Cooperative Extension at the University of Nebraska.

K.B. White Company Inc. - Irrigation design consultant specializing in golf courses, athletic fields, and commercial sites.

International Irrigation Supply, Inc. - US based company representing over 100 manufacturers.

Irrigation Journal - Journal for the agricultural irrigation industry including engineers, on-farm specialists, and extension agents.

Texas Waternet - Texas Water Resource Institute. Has articles and links about irrigation and water management.

Center for Irrigation Technology - An independent research and testing facility, based at California State University. Dedicated to advancing irrigation technology.

Disease Management for Nurseries - Topics include: capturing and recycling irrigation runoff and managing disease in recycling irrigation systems. From The Department of Entomology and Plant Pathology, Oklahoma State University.

BIE: Irrigation Engineering Software - Computer software developed by the Software Engineering Division of the Biological and Irrigation Engineering Department.

Wetland Reservoir Subirrigation Systems - Article describes a system comprised of a wetland and a water storage reservoir linked to a network of subsurface pipes used at different times to either drain or irrigate crops through the root zone.

IRRICON - Irrigation consultants, designers and suppliers of all types of irrigation systems.

Irrigation Services - ESI Environmental Sensors Inc. manufactures irrigation instrumentation for monitoring and controlling water. ESI's irrigation systems are rugged, easy to use, and maintenance-free.

Agricultural & Residential Irrigation Design - Professional software for creating irrigation projects and to automatically build estimates.

FAO: Water Resources, Development and Management Service - Promotes efficient use and conservation of water resources to achieve food security and sustainable agriculture and rural development.

International Water Management Institute - This site contains information about irrigation systems and better water management.

IIC On-Farm Irrigation: Design, Evaluation, and Scheduling Course - Course designed to give farmers an understanding of water needs at the farm level and to develop schedules and operating procedures to maximize the benefits of irrigation.

International Irrigation Center - An irrigation support site with links to equipment information and news.

International Irrigation Systems, Inc. - Custom-build and order irrigation systems using the Irrigro online store. Design systems for small gardens and landscaping to large commercial grower installations.

Irrigation Training an Research Center - University web site. Focusing on irrigation training and research.

Irrigation Courses - Available courses in irrigation design.

Irrigation Design and Water Resource Services - Irrigation system evaluators and consultants.

Irrigation for Lawns and Gardens - Information and important considerations regarding irrigation Installation.

Irrigation System Design - Jess Stryker's irrigation system design and installation tutorials.

Landscape Irrigation Designing For A Thristy Landscape - Information on irrigation design. Designs for irrigation systems.

James P. Chinni Irrigation Design & Consultants - An irrigation design and consulting company.

Jetwet for Agriculture - Jetwet agriculture formula helps in the conservation of water while protecting the environment from run-off.

Montgomery Irrigation - Information regarding creating, engineering and designing irrigation systems for all types of agricultural, residential and commercial needs.

Irrigation Scheduling Methods. - Irrigation scheduling/soil monitoring system with fully scheduling software

Irrigation Association of Australia Home Page - This site has been developed by the Irrigation Association of Australia to provide comprehensive information about the irrigation industry and irrigation practices in Australia.

Irrigation Design. - Free Landscape Sprinkler Irrigation System Design Tutorial.

Controlled Irrigation - Irrigation design, supply, installation, equipment and related products.

Irrigation - This site discusses irrigation techniques using water from rivers.

Trickle Irrigation Calculator - Calculations for designing trickle irrigation systems.