Spraying Large Nut Trees – Part 2

This article continues from Part 1. Droplet size Droplet size influences droplet behaviour. The following table lists the pros and cons to changing droplet size when overall spray volume (e.g. L/ha) remains constant. Relative Spray Quality Pros Cons Coarser Droplets Lower drift potential because they resist deflection by wind and evaporation from heat and low […]

Read More… from Spraying Large Nut Trees – Part 2

Spraying Large Nut Trees – Part 1

Introduction I’ve studied spray applications in a diversity of crops, both broad acre and specialty, but perhaps nothing is as challenging large tree nut canopies. Australia’s macadamia orchards can form >10 metre high, >4 metre deep canopy walls! So in writing this article I face the opposite situation I normally encounter when advising on airblast […]

Read More… from Spraying Large Nut Trees – Part 1

Tower Power

Are you considering shelling out for a tower extension for your airblast sprayer? Spray towers are an excellent investment, but they warrant special consideration. Towers move the air and nozzles closer to the target compared to the curved booms on a conventional airblast sprayer. When the distance-to-target is reduced, the odds of droplets reaching the […]

Read More… from Tower Power

Nozzle Sizing and Calibration Charts

Application Chart (metric)

Need to find the right nozzle size for your application?  Sometimes a simple chart is the easiest way to figure things out.  Print it and place it in your sprayer cab. In this chart, identify your water volume along the top row, and follow the column until you encounter the travel speeds you’re interested in. […]

Read More… from Nozzle Sizing and Calibration Charts

Diluting 20,000-Fold with a 30 Gallon Remaining Volume in a 1,200 Gallon Tank

(This short article is an addendum to this article) Our goal in this example is to dilute by a factor of 20,000. The maximum amount of dilution possible with a 1,200 gallon tank and a 30 gallon remainder is 1200/30=40. The formulae: Dilution per Rinse = final dilution ^(1/# of rinses) Rinse Volume = (dilution […]

Read More… from Diluting 20,000-Fold with a 30 Gallon Remaining Volume in a 1,200 Gallon Tank