Chemical Characteristics
pH
Nitrogen-Phosphorus-Potassium (N-P-K)
Total carbon (TC), carbon/nitrogen ratio
Calorific value: Calorific value is the amount of heat generated from combustion of a unit weight of a substance, expressed as kilo calorie per kilogram.
The calorific value is determined in the laboratory by Bomb Calorimeter
Bio-chemical characteristics: carbohydrate, proteins, natural fiber, and biodegradable factor.
Toxic characteristics: heavy metals, pesticides, insecticides etc.