The Irrigation Water Requirements
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CHAPTER 6: Irrigation scheduling
www.fao.orgwater requirements during the irrigation season. The amount of rainwater retained in the root zone is called effective rainfall (Pe) and should be deducted from the total irrigation water requirements calculated. It can be roughly estimated as: Pe = 0.8 P where P > 75 mm/month; Pe = 0.6 P where P < 75 mm/month. Pressurized Irrigation Techniques 6.5
Chapter 2 Irrigation Water Requirements - USDA
www.wcc.nrcs.usda.govTodays management of irrigation water requires using the best estimate that current technology can provide for the determination of crop water use and field irrigation water requirements. Support for many of the estimated values included in this chapter come from field research and many field evaluations over many years.
Small Acreage Irrigation Guide - Colorado State University
sam.extension.colostate.eduCrop water requirements and irrigation scheduling are discussed, and examples are provided to help the user with common calculations necessary for irrigation scheduling and ordering the necessary amount of water to meet crop needs. In addition, information is provided on irrigation
Crop water requirements - Food and Agriculture Organization
www.fao.orgwater balance, which in turn forms the basis for predicting season.al and peak irrigation supplies for general planning purposes. Attention is given to irrigation efficiency and water requirements for cultural practices and leaching of salts. In Part 11.2 methods are presented to arrive at field and scheme supply schedules with
Drip Irrigation: The Basics - University of Arizona
extension.arizona.eduGroup plants with similar water requirements such as trees, shrubs, ground covers and turf on separate valves. Know the number of plants for each type and their water requirements. Design with consideration to pipe length, size and elevation changes. Plan to expand your irrigation system as plants grow.
Chapter 2* - Water Quality Requirements
www.who.intdescribe water quality requirements for protecting and maintaining an individual use. Water quality criteria are based on variables that characterise the quality of water and/or the quality of the suspended particulate matter, the bottom sediment and the biota. Many water quality criteria set a maximum level for the concentration of a substance ...
CENTER PIVOT IRRIGATION
www.ars.usda.govFlow requirements for center pivots and lateral move systems are defined in terms of total flow supplied to the system or the total system capacity, Q T (gpm), for hydraulic requirements, and gross system capacity, Q g (gpm/ac), for irrigation requirements and management. Q g is defined as the total system capacity, Q T, divided by the total ...
IRRIGATION P.I.P. - JM Eagle
www.jmeagle.comThis specification designates general requirements for 6" through 27" unplasticized polyvinyl chloride (PVC) plastic irrigation pipe with integral bell and spigot joints for the conveyance of water and other fluids. MATERIALS The pipe dimensions shall meet the requirements of NRCS 430-DD and/or ASTM D2241 “Standard Specification
Irrigation Guide - USDA
www.nrcs.usda.govsoils and irrigation water requirements for crops. In some instances statements are based on field experi-ences of the primary authors. The objective of this guide is to assist NRCS employ-ees in providing sound technical assistance for the maintenance of soil productivity, conservation of water and energy, and maintenance or improvement of