It used to be that growers had few if any options in bring uniformity to a vineyard with so much variability in soil type among other geographical characteristics.  There have been so many recent developments and technological advances in plant and soil sensing equipment that has taken precision viticulture to a whole new level.  Watch this brief interview with UC Davis Viticulture Extension Specialist Kaan Kurtural as he discussed this at UCCE Grape Day recently at the Kearney Ag Center in Parlier.  Read more about it in American Vineyard Magazine.