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Supplemental Irrigation
Supplemental irrigation (SI) can be defined as the addition of small amounts of water to essentially rainfed crops during times when rainfall fails to provide sufficient moisture for normal plant growth, in order to improve and stabilize yields. SI in areas with limited water resources is based on the following three premises:
- Water is applied to a rain-fed crop which would normally produce some yield without irrigation.
- Since precipitation is the principal source of moisture for rain-fed crops, SI is only applied when precipitation fails to provide essential moisture for improved and stabilized production.
- The amount and timing of SI are not scheduled to provide moisture-stress-free conditions throughout the growing season, but to ensure that the minimum amount of water required for optimal (not maximum) yield is available during the critical stages of crop growth.
Supplemental irrigation is the opposite of full or conventional irrigation (FI). In the latter, the principal source of moisture is fully controlled irrigation water, and highly variable limited precipitation is only supplementary. SI is dependent on the precipitation of a basic source of water for the crop.
Water for supplemental irrigation comes mainly from surface sources, but shallow groundwater aquifers increasingly are being used. Among non-conventional water resources that have potential for the future, such as treated sewage water-harvesting is also important.
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Irrigation
Sources of Irrigation
Application of Irrigation water
Canal Irrigation +
Flood Irrigation +
Deficit Irrigation +
Supplemental Irrigation +
Sprinkler Irrigation +
Drip Irrigation +
Lift Irrigation +
Centre Pivot Irrigation +
Tidal Irrigation +
Micro-Irrigation Technologies for Small Holders +
Automatic Irrigation Systems +
Pressurized Irrigation +
Irrigation in Viticulture +
Purpose of Irrigation
Instruments and implements of Irrigation
Irrigation Management
Irrigation and environment
Capacity Development
Drainage
Dictionary - Supplemental Irrigation Terms
- Irrigation pipe aqueduct, Pipe aqueduct, Pipe flume
- Syphon, Inverted siphon, Irrigation syphon, Canal syphon, Syphon superpassage
- Lift irrigation area, or Lift area
- Continuous-flow irrigation
- Night-storage irrigation system
- Intermittent-flow irrigation system
- Irrigation return flow
- Farm irrigation structures
- Collective irrigation system
- Individual irrigation system
- Perennial irrigation
- Seasonal irrigation
- Supplemental irrigation
- Systematic irrigation
- Flow irrigation, or Gravity irrigation
- Pumping irrigation
- Inundation irrigation
- Irrigation from a storage reservoir
- Irrigation from groundwater
- Irrigation by flood water spreading
- Sailab irrigation (a term used in India and Pakistan)
- Micro basin irrigation
- Irrigation by spreading
- Irrigation
- Irrigation interval
- Irrigation dose
- Ideal irrigation interval
- Irrigation season
- Fall irrigation (USA)
- Winter irrigation (USA)
- Early irrigation (USA)
- Sub-irrigation
- Overirrigation
- Irrigation canals
- Surface irrigation
- Flood irrigation
- Basin method of irrigation, or Irrigation by beds
- Flush irrigation
- Spate irrigation
- Border irrigation, or Border method
- Flooding from ditches, or (contour ditch irrigation)
- Corrugation irrigation
- Furrow irrigation
- Surge irrigation
- Duration of irrigation
- Secondary flow, Two discharge, or Cutback irrigation
- Primary flow irrigation (single discharge)
- Wave irrigation
- Irrigation through buried drains, Irrigation-drainage, or Vallenhove process
- Irrigation by nappe control, or Ramspol process
- Selection of irrigation parameters
- Sprinkler irrigation
- Irrigation terminal
- Irrigation device
- Perforated pipe sprinkler irrigation
- Irrigation sprinkler machine
- Centre pivot irrigation
- Lateral-move irrigation machine sprinkler method
- Solid set irrigation
- Piloting of irrigation
- Irrigation cycle
- Micro-irrigation, Localized irrigation, Drip irrigation, Trickle irrigation
- Mobile micro-irrigation
- Pulse irrigation
- Surface drip irrigation
- Buried drip irrigation
- Drip irrigation functioning by propulsions
- Micro-irrigation network
- Micro-irrigation nozzle-line
- Irrigation dose
- Semi-automatic control (of irrigation)
- Micro-irrigation system with hydraulic sequential operation
- Automatic control (of irrigation)
- Porous wall microirrigation tubing
- Proportional irrigation pump
- Irrigation water
- Irrigation water requirement, Irrigation need
- Net irrigation requirement, Farm delivery requirement, or Delta at farm
- Crop irrigation requirement
- Diversion requirement, Gross irrigation requirement, or Delta at head of main canal
- Optimum irrigation requirements
- Irrigation efficiency, Farm irrigation efficiency, Farm delivery efficiency, Water conveyance and delivery efficiency, or Overall efficiency
- Irrigation water-requirement
- Subirrigation
- Surge irrigation
- Irrigation water use efficiency
- Unit irrigation efficiency
- Economic efficiency of irrigation
- Irrigation efficiency
- Agronomic efficiency of irrigation or Agronomic productivity of irrigation
- Degree of durability of irrigation
- Programmed irrigation
- Fully automatic irrigation system
- Irrigation development project or system
- Irrigation
- Surface irrigation
- Basin Irrigation
- Overhead irrigation
- Sub‑irrigation
- Microirrigation
- Trickle irrigation
- Drip irrigation
- Total irrigation
- Supplemental irrigation
- Preplant irrigation
- Organic irrigation
- Conjunctive irrigation planning
- Irrigation project
- Irrigation potential
- Assessment of irrigation charges
- Irrigation cess
- Water rate, Water charge, Irrigation rate, or Irrigation assessment
- Primary benefits, Primary effects, Direct irrigation benefits, or Direct irrigation effects
- Secondary benefits, Secondary effects, Indirect irrigation benefits, or Indirect irrigation effects
- Economic value of unit of irrigation water
- Revenue value of a unit of irrigation water
