BOOK XVII. II. 17-21
in the same class of trees, as for example among pears, winter varieties require rain on one day and early pears on another, although they all alike need a period of wintry weather before budding. The same cause that makes a north-west wind more beneficial than a south-west wind also renders inland regions superior to places on the coast—the reason being that they are usually cooler—and mountain districts superior to plains, and rain in the night preferable to rain by day, vegetation getting more enjoyment from the water when the sun does not immediately make it evaporate.
Effects on aspects of vines.Connected with this subject is also the theory of the situation for vineyards and treesa—what aspect they should face. Virgil condemned their being planted looking west,Georg. II. 298. but some have preferred that aspect to an easterly position, while most authorities, I notice, approve the south; and I do not think that any hard and fast rule can be laid down on this point—skilled attention must be paid to the nature of the soil, the character of the locality and the features of the particular climate. In Africa for vineyards to face south is bad for the vine and also unhealthy for the grower, because the country itself lies under the southern quarter of the sky, and consequently he who there chooses a westerly or northern aspect for planting will achieve the best blending of soil with climate. When Virgil condemns a western aspect, there seems no doubt that lie condemns a northern aspect also, although in Italy below the Alps it has generally been experienced that no vineyards bear better than those so situated. The wind also forms a great consideration. In the province of Narbonne and in Liguria and part of Tuscany it is thought to be a mistake to plant vines
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