Agricultural Irrigation

Agricultural Production Agricultural Irrigation

Agricultural Irrigation

Agricultural water users can optimize water use efficiency and protect the quality of water resources by applying basic information about irrigation systems, crop water use and management practices.

Chemigation


Chemigation is the practice of applying agrichemicals to cropland using an irrigation system to distribute both the water and chemical.

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Center Pivots

Application Uniformity of In-Canopy Sprinklers, G1712
PDF version
Use of in-canopy sprinklers can reduce application uniformity and increase runoff. Learn how to evaluate the efficiency of in-canopy sprinklers.

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Irrigation Management Publications from Nebraska Extension

Harvesting Crop Residues, NebGuide G1846
Issues of crop residue harvest, including nutrient removal and effects on erosion, soil quality, water loss, and yield are discussed in this NebGuide.

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Reduce Need for Irrigation by Maintaining Crop Residue and Reducing Soil Tillage

Leaving higher levels of crop residue and doing less tillage can increase the soil water balance by increasing the amount of water that infiltrates the soil from irrigation or precipitation, and decreasing the amount of water that runs off the soil surface. More residue and less tillage also reduce the rate of evaporation of water from the soil. Maintaining residue on the soil surface and doing less tillage can significantly reduce the amount of irrigation water needed to grow a crop.

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Precipitation Patterns

Another major factor in irrigation scheduling is making use of precipitation, both during the growing season and in the off season. Shown below is a map detailing the average net irrigation requirement for corn for the State of Nebraska.

The net irrigation requirement is based on precipitation patterns and soils. In wet years less water is needed and in dry years more water will be needed.

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