1) Seed treatment quality data should be obtained before the trial. As the treatment quality may vary between seed treatments and batches, a poor seed treatment quality should be used as a worst case scenario. The total emission from the sowing machine is influenced by the dust abrasiveness (Heubach-value) as well as by the content of AI in dust. The seed quality used for trials needs to be documented for both, amount of dust and content of AI, before the trial starts and given in the report. Since 2008 the Heubach-Dustmeter test method (Heimbach, 2008) was introduced and proposed as a standardized measure of dust abrasion. The Heubach method mainly detects fine dust particles which are most prone for drifting.
2) Residue analysis of the AI in the dust needs to be given in the study as well as information on the AI and the treatment rates.
3) Furthermore, dusts may be present at the bottom of the seed bags. Thus, before the trials, seed bags should be checked to determine if any dusts remain at the bottom. All contents from the bag should be filled into the driller.