3. Varieties of coffee trees
Where and what gives acidity
Different varieties of trees can give different degrees of acidity and different characteristics of acidity. Here, probably, the most basic such differences are Arabica and Robusta. Traditionally, Arabica has more acidity, more essential oils, and more flavor, it is richer and more interesting. In Robusta, acidity is very low, it is practically not there, there is a very large amount of caffeine, phenolic compounds, and quite bitter, dense such a drink is obtained, unlike Arabica.
Well, there are also differences in Arabica itself. Different types of trees, give either more acidity and a richer taste, or less. For example Geisha or Pink Bourbon. These varieties, are very interesting, very rich in taste, and aroma, and their acidity is very complex and interesting, most often it is malic, wine citrus acidity.