Adding plant residue with or without mineral fertilizers to soils is seen as an excellent approach in agriculture due to the fact that it enhances the quality of the plant and the fertility of the soil. The study intends to elucidate the influence of green manure on the properties of soil and enumerate suitable amounts of green manure that would be optimum for the soil. A field experiment was conducted at the experimental farm of Institute of Sustainable Agro technology, University Malaysia Perlis, Padang Besar, Perlis, Malaysia. The results confirmed that mungbean as green manure significantly increased all of the properties of the soil except for total N and pH. Level 15% (150g kg-1 soil) factor had the highest magnesium, phosphorus, soil organic carbon, organic matter and C:N, whereas control treatment gave highest value in pH and total N. There was no significant different among the treatments in calcium and potassium content. The three levels of mungbean residue had impact on soil properties but level 15% led to improve the soil chemical properties more than did 5% (50 gkg-1 soil) and 10% (100 gkg-1 soil).
