What is a common method used to estimate spray coverage in aerial applications?

Using water-sensitive paper tests is a well-established method for estimating spray coverage in aerial applications. This technique involves applying water-sensitive paper in areas where the spray is expected to land. When the plane sprays the crop, any droplets that land on this paper will cause a color change, allowing the operator to visually assess the distribution and density of the applied spray.

This method is beneficial because it provides a tangible way to quantify coverage and helps in analyzing whether the application met the desired standards. It can reveal issues such as poor uniformity in droplet distribution, which can occur due to factors like wind conditions or improper nozzle settings.

Other methods, like visual assessments, may provide insight but lack the quantitative accuracy that water-sensitive paper can offer. Soil sampling is not applicable for measuring aerial spray coverage, as it is more focused on soil health and nutrient content rather than the assessment of aerial applications. Thermal imaging can be used for assessing crop health or detecting moisture levels but is less effective for directly measuring spray coverage compared to the specificity of water-sensitive paper tests.