i wouldn't call myself an expert by any means. the article i wrote is actually linked in the footer in the similar threads section.
you can get close with some primitive, manual techniques, but to effectively steer you need sensors and automation damn near end to end. EC and water content are paramount to effective steering, and when attempting the method it is very, very easy to fuck up real fast since you'll be running on the edge of what the plants can handle at almost all times.
i highly recommend getting a handle on what drybacks and high fertigation cycles do before diving full on into attempting steering considering if you aren't familiar with how those two correlate to media water content and EC, you'll end up chasing your tail on deficiencies that have nothing to do with your nutrient solution and everything to do with how you're applying that solution. Additionally, you really need to have your environment dialed in from VPD to DLI since you're already going to be introducing stress conditions to the plants at carefully timed intervals.
the suppliers that produce crop steering systems also keep a lot of their information very close to their chests, and not a lot of people are willing to publish in-depth information (likely due to non-compete agreements as part of purchasing the gear to do it). What i based my article on was a collection of information i found by scouring hundreds of websites and academic white papers over a period of months, and even my article is not nearly comprehensive enough to be considered a how-to guide. it's more like a high-level day one explanation of a college course without providing any of the more in-depth knowledge a full semester would yield.
