What to Consider when Choosing Open-Field Sprinkler Irrigation System
Sprinkler Spacing
The distance between sprinklers in an open-field is primarily determined based on the planting pattern and the farm machinery and tools used. Nevertheless, there are other factors to consider. The closer the sprinklers are spaced, the more units and pipes you will require and the higher your system cost will be. On the other hand, wider spacing makes it harder to obtain uniform water distribution. Especially in windy areas.
Sprinkler Flow-Rate and Overall System Precipitation Rate
It is important to choose a solution that can provide the daily crop needs and still avoid run-off that creates uneven water distribution and soil erosion. You should look for a precision irrigation system with a precipitation rate that correlates with the soil’s infiltration capacity. Unlike centre-pivots or rain-guns with high hourly flow rates, precision sprinkler systems have low to medium precipitation rates, so they don’t generate run-off.
Droplet Size and Jet Impact
Aggressive jets can injure young crops, expose seeds and create soil erosion or provoke soil crusting. On the other hand, very fine jets can produce small droplets of water which may shift with the wind or evaporate, affecting uniform distribution of the water. Look for a sprinkler that can reach the required distance and maintain even distribution patterns, but will not damage your crops.
