sugestão: vine (row) spacing

Vine Spacing - An important tool in helping grow quality wine grapes. Generally, grape quality is related to both yield per acre and yield per vine. The closer spaced the grape vines are in a vineyard, the more each vine must compete with others for nutrients. This competition helps reduce the vine's vigor, and it spends more of its energy producing smaller but more intense fruit. A vineyard's density is usually expressed as the distance between vines and the distance between rows. High density modern vineyards are frequently planted with spacing as close as 1 meter (3-ft., 3-in.) apart for each vine and each row. This would be "meter by meter" spacing. Larger spacings result in fewer plants per acre.
http://www.avalonwine.com/wine-glossary.php

American Vineyard Foundation
Wines & Vines, Feb. 1998 by Larry Walker
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Root density research has demonstrated that closer vine spacing did not cause vines to establish deeper root systems. Vines at ---- narrow spacing ----- do not gain access to additional water at deeper depths, disproving a commonly-held belief. (...)
http://findarticles.com/p/articles/mi_m3488/is_n2_v79/ai_203...

bom trabalho!
beatriz