Droplet Size, Application Intensity, and Application Rate in i-Wob2's Success

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Date: 
Thursday, March 30, 2017

The outstanding distribution uniformity of Senninger® Wobbler® technology is one reason the i-Wob2 is the most imitated sprinkler in the irrigation industry. The off-center rotary action of a grooved deflector combines with the wobbling action to create consistently-sized droplets. Unlike stream-driven sprinklers, the i-Wob2 instantaneously covers a 360° area.

Droplet Size

The i-Wob2 is available with four different deflectors to select the droplet size that better matches the soil's characteristics to get better infiltration and maintain good soil structure. Ideally, droplets should be large enough to combat the effects of strong winds but not so large as to disrupt the soil.

Application Intensity

While larger droplets resist wind-drift and evaporation loss, their higher kinetic energy can lead to surface sealing and erosion on tighter soils. Smaller droplets are suitable for tighter soils, while looser soils benefit from larger droplets

Because the i-Wob2 applies water instantaneously over a larger area, it distributes droplets with a lower application intensity to help preserve the soil structure and infiltration capabilities.

Application Rate

While the application rate can be adjusted to the specific crop and growth stage, considering only crop needs could result in lesser yields. A sprinkler's application rate must match the soil's infiltration rate to prevent runoff and over- or under-watered areas within the field.

In addition, double goosenecks and truss rod hose slings are perfect for dividing the flow from each outlet in half for two sprinklers on either side of the mainline. Spreading the flow over an even larger application area helps increase soak time.

i-Wob2’s four deflector models

SA6: Standard-Angle
6-Groove
Small droplets (grey)
SA9: Standard-Angle
9-Groove
Medium droplets (black)
LA9: Low-Angle
9-Groove
Medium droplets (blue)
LA6: Low-Angle
6-Groove
Large droplets (white)

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