Now showing items 1-5 of 5

  • Chemigation in the Pacific Northwest 

    Trimmer, Walter L.; Ley, Thomas W.; Clough, G.; Larsen, D. (Pullman, Washington : Washington State University. Extension.Corvallis, Oregon : Oregon State University. Extension Service.Moscow, Idaho : University of Idaho. Extension.Washington, D.C. : U.S. Dept. of Agriculture., 1992-01)
    Chemigation is the injection of agricultural chemicals such as fertilizers, herbicides, and insecticides into an irrigation system. This bulletin discusses characteristics of these chemicals, safety equipment, irrigation ...
  • Irrigation Scheduling 

    Trimmer, Walter L.; Hansen, Hugh J. (Pullman, Washington : Washington State University. Extension.Corvallis, Oregon : Oregon State University. Extension Service.Moscow, Idaho : University of Idaho. Extension.Washington, D.C. : U.S. Dept. of Agriculture., 1994-10)
    This guide to scheduling irrigation that matches crop water needs includes detailed tables on soil capacities and selected crops, as well as formulas for determining gross application and usable moisture. 2 pages.
  • Sizing Irrigation Mainlines and Fittings 

    Trimmer, Walter L.; Hansen, Hugh J. (Pullman, Washington : Washington State University. Extension.Corvallis, Oregon : Oregon State University. Extension Service.Moscow, Idaho : University of Idaho. Extension.Washington, D.C. : U.S. Dept. of Agriculture., 1997-10)
    This guide discusses important considerations in selecting the most efficient size of mainline pipes and fittings for an irrigation system. Includes tables and diagrams for calculating friction loss, valve operating costs, ...
  • Stretching Irrigation Water Supplies 

    Trimmer, Walter L. (Pullman, Washington : Washington State University. Extension.Corvallis, Oregon : Oregon State University. Extension Service.Moscow, Idaho : University of Idaho. Extension.Washington, D.C. : U.S. Dept. of Agriculture., 1994-04)
    The author discusses factors that conserve irrigation water supplies: schedule irrigation, apply water uniformly, maintain a tight system, reuse water, and keep ditches cleaned out, and consider changing to crops that need ...
  • Walk-Through Irrigation Systems Analysis 

    Hansen, Hugh J.; Trimmer, Walter L. (Pullman, Washington : Washington State University. Extension.Corvallis, Oregon : Oregon State University. Extension Service.Moscow, Idaho : University of Idaho. Extension.Washington, D.C. : U.S. Dept. of Agriculture., 1997-10)
    This worksheet lists details to check on a walk-through inspection analysis of an entire irrigation system, both hydraulics and hardware. Includes suction system, pump and fittings, electric motor, electric service, mainline ...