Robusta
The Robusta coffee plant is the second most commercialized variety, with 25% of the world coffee production. Unlike Arabica, a 100% Robusta variety can not be made, but it is used to add blends to a greater or lesser extent. It has a higher concentration of caffeine, between 1.7 and 4%. The coffee of this variety grows best in areas where the temperature ranges between 24 ° - 30 ° C. The grain is round, smaller than the Arabica grain and has a straight opening.
Arabica
Arabica coffee is the variety of coffee that is most cultivated and marketed, representing about 75% of world production. Its grain has a lower amount of caffeine than Robusta, between 0.4 and 1.4%. It grows best on land where the temperature ranges between 15 ° - 24 ° C. The shape of its grain is oval with a small opening in the shape of S.