Abstract: By the research results, the authors determined that the correlations and mutual interactions of two or more factors appear in the Basalt soil environment under coffee cultivation. In which, the most important is the content of organic matter and soil pH. Because organic matter has been involved in improving a number of soil properties, the most prominent is the interaction of biological components and organic matter with some components and soil chemistry such as CEC, total N , total phosphorus and dissolved phosphorus, total and easily digested potassium, Ca2 +, Mg2 + and some trace elements. In addition, the organic matter composition also increases the density, number and biomass of earthworms, as well as the number and types of beneficial microorganisms in the soil (total microorganisms, nitrogen fixing bacteria. , phosphorus-degradable bacteria, for cellulose-degrading organisms).