TY - JOUR T1 - A Root Observation Laboratory for Studies with Grapevines JF - American Journal of Enology and Viticulture JO - Am J Enol Vitic. SP - 36 LP - 39 DO - 10.5344/ajev.1976.27.1.36 VL - 27 IS - 1 AU - B. M. Freeman AU - R. E. Smart Y1 - 1976/01/01 UR - http://www.ajevonline.org/content/27/1/36.abstract N2 - A new facility for studies of grapevine root physiology is described. It consists of an underground laboratory with ten individual plant chambers at the periphery, offering a 0.32-m2 viewing area per plant. Preliminary data, presented on the periodicity of root growth and its response to irrigation treatments demonstrate a greater root production with a relatively dry treatment than with a wet treatment. Rapid root development began 10 weeks after bud burst, and there were two peaks of root growth when aerial growth was reduced. The first peak of root growth occurred when shoot growth had ceased, and the second occurred after the fruit was harvested. ER -