Coffee @ nationalgeographic.com (#)

  „The tropical Americas, which now enjoy a near monopoly on arabica coffees, have what it takes for peak production: rich soil, reliable rainfall, ideal altitudes between 3,000 and 6,000 feet [900 and 1,800 meters].“

http://www.nationalgeographic.com/coffee/ article3.html - Cached

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Some slightly related:

International Coffee Organization

  „Whereas robusta coffee can be grown between sea-level and about 800 metres, arabica does best at higher altitudes and is often grown in hilly areas. As altitude relates to temperature, arabica can be grown at lower levels further from the Equator, until limited by frost. All coffee needs good drainage, but it can grow on soils of different depths, pH and mineral content, given suitable applications of fertilizer.“

http://www.ico.org/acoff/ecology.htm - Cached

Indian coffee board- monthly magazine- Cover Story- Rainfall Pattern and Drought Situation in Coffee Plantations and its Impact

  „During the first round of crop harvest, the percent wet parchment was less, which improved later on during subsequent harvests. The percentage of "A" grade beans in arabica coffee was around 22 to 33% during the first round of crop harvest, which improved to 40 to 65% during subsequent round of picking. The plantations, which received adequate rainfall and also plantations of high altitude have shown normal percentage of 52.40 to 82.18% "A" grade beans. The plantations affected with drought had low percentage of "A" grade beans to an extent of 37.18 to 56.13%.“

http://www.indiacoffee.org/newsletter/2004/march/ cover_story.html - Cached

What Is Coffee? - National Coffee Association

  „It also has the advantage of being able to withstand warmer climates, preferring constant temperatures between 75 and 85 degrees, which enables it to grow at far lower altitudes than arabica.  It requires about 60 inches of rainfall a year and cannot withstand a frost. Compared with arabica, robusta beans produce a coffee which has a distinctive taste and about 50-60% more caffeine.  Robusta is primarily used in blends and for instant coffees.“

http://www.ncausa.org/public/pages/ index.cfm?pageid=67 - Cached

Coffee Origin - From South America, Africa, Asia Pacific, Coffee Pictures and Attributes.

  „Arabica is the earliestcultivated species of the coffee tree. It grows best in altitudes between 4000 and 6000feet above sea level. It require special soil conditions with just the right balance ofwarmth and moisture.“

http://www.koffeekorner.com/koffeesources.htm - Cached

ICAFE

  „In Costa Rica, rainfall, relative humidity and temperature tend to be lower in the higher altitudes, although there are significant differences between the Pacific and Atlantic regions of the country. Altitude influences climate and affects the overall size and hardness of the coffee bean, as well as the quality of the brew, particularly its acidity. In addition, the Arabica variety has special characteristics that produce an aromatic, delicate good-tasting coffee.“

http://www.icafe.go.cr/icafe/7_regiones_eng.htm - Cached

Archived in Coffee Production, Arabica Coffee