Topic summary
Vineyards

Extracted from the Wikipedia article Vineyard.
Terroir
Vineyards are often located on hillsides and planted in soil that is of only marginal value to other plants. A common saying is that "the worse the soil, the better the wine." Planting on hillsides, especially those facing north (in the southern hemisphere) or south (in the northern hemisphere), is most often in an attempt to maximize the amount of sunlight that falls on the vineyard. For this reason, some of the best wines come from vineyards planted on quite steep hills, conditions which would make most other agricultural products uneconomic. The stereotypical vineyard site for wine grapes (in the Northern hemisphere) is a hillside in a dry climate with a southern exposure, good drainage to reduce unnecessary water uptake, and balanced pruning to force the vine to put more of its energy into the fruit, rather than foliage.