Click on “Download PDF” for the PDF version or on the title for the HTML version.

If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options.

ASAE Standard S341.2 (ASAE, 1990) specifies that collection trays for pattern evaluation must have internal subdivisions to partially prevent material from bouncing out of the pans. The problem of material bouncing into the pans is not addressed in the standard. A laboratory experiment was conducted in which test runs were made: in the normal manner, with bounce into the pans eliminated by elevating the pans and spreader, and with bounce in and out completely eliminated by using deep pans and an elevated spreader. With large, spherical particles, there were significant differences in the amount of material collected under the three conditions. This resulted in significant differences in apparent application rate and smaller differences in apparent pattern quality. With large, spherical particles, over twice as much material was collected per pan in the standard test on concrete due to particle bounce into the pans.