Hanifah, T. Abu2019-01-082019-01-082019-01-09978-979-792-865-0wahyu sari yenihttp://repository.unri.ac.id/handle/123456789/9522The land fires caused changes in the structure and composition of the soil is like nutrient that effected growth of the plant around it. To know how far the effect of land fire with different frequency, the research about the content of macronutrients such as Sodium (Na), heavy metal cadmium (Cd) and maturity level of peat in area Pakning Asal, Bengkalis Regency needs to be done. The content of cadmium and sodium were determined by using Atomic Absorption Spectrophotometer and Flame Photometer, and analysis of maturity level of peat was determined by Sieve method. The results showed that the Na content was available and total in the unburnt and once burned soil increased and decreased on the soil several times burned from 26,716; 34,116; 25,162 mg/Kg for available and 49,384; 78,578; 29.763 mg/Kg for total. Cd content was available and total on unburnt and once burned soil decreases and increases in soil several times burns was 9,454; 8,666; 9,403 mg/Kg to be available and 9,625; 9,602; 9,962 mg/Kg for total. The maturity level of peat it has a fiber count of >75%.enDifferent frequencyland firesCadmiumSodiumArticle