ASABE_Standard_572_1_Droplet_Size_Classification.pdf

The document is the ASABE S572.1 Droplet Size Classification standard, developed by the American Society of Agricultural and Biological Engineers to measure and interpret spray quality from application tips. The standard provides a comprehensive classification system for spray droplet sizes, ranging from Extremely Fine to Ultra Coarse, with detailed specifications including droplet volume median diameter (VMD) ranges, color codes, retention characteristics, and intended applications.

The classification system covers droplet sizes from <60 microns (Extremely Fine) to >665 microns (Ultra Coarse), with each category assigned specific attributes such as color codes (Purple to Black), retention on wet leaves (Excellent to Very Poor), and recommended use cases. Key insights include recommendations for most agrochemical applications to use fine, medium, or coarse sprays, with detailed guidance on droplet size implications for different agricultural and horticultural treatments, such as systemic herbicides, liquid fertilizers, and targeted pest control applications.