a. Total Nitrogen at Different Contamination Levels; b. Exchangeable Calcium at Different Contamination Levels; c. Exchangeable Magnesium at Different Contamination Levels; d. Exchangeable Potassium at Different Contamination Levels; e. Exchangeable Sodium at Different Contamination Levels; f. Exchangeable Acidity at Different Contamination Levels; g. ECEC at Different Contamination Levels; h. Base Saturation at Different Contamination Levels; i. THC at Different Contamination Levels