This document specifies a test method for evaluating the effect of fine bubble water on the growth promotion of hydroponically grown lettuce by estimating the incremental gain in mass of the stems and leaves over a specified growth period.st edition 2019-05 Fine bubble technology — Agricultural applications — Part 1: Test method for evaluating the growth promotion of hydroponically grown lettuce Reference number ISO/TS 23016-1:2019(E) ？ ISO 2019 ISO/TS 23016-1:2019(E) COPYRIGHT PROTECTED DOCUMENT ？ ISO 2019 All rights reserved. Unless otherwise specified, or required in the context o