When using a Bouyoucos Hydrometer, all of the sand has dropped below the zone of measurement after __________.
Answer: 40 seconds
When using a Bouyoucos Hydrometer, all of the sand has dropped below the zone of measurement after __________.
Answer: 40 seconds
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.