INAUGURATION OF CHEMISTRY SCIENCE PROFESSOR
"Clay minerals are particularly important because they have a relatively high surface area. For example, montmorillonite, which I used several times as a research sample, has a specific surface area of 83.9 m2 g -1. This means that 1.1 gram (1 / 4 teaspoons) of clay mineral samples from the soil have a surface area of 100 m2, which is the same as the area of a football field. This indicates that although physically the clay mineral is very small, it has a very large substance for life. "Indonesian soil binds various minerals and elements needed by plants.



