The field of Agricultural Chemistry does not fade away as time goes by, it indeed becomes increasingly important as we move towards 21st century. It is still indispensable and plays an important role in agricultural production, developing high quality processed products, maintaining ecological and environmental quality, and in investigating and managing the sustainable use of land, plant and microbial resources, etc. Agricultural Chemistry continues to play a key role in the welfare of human being, therefore the focuses of current agricultural chemistry should not only base on the theory and technology of the traditional agricultural chemistry, but also applying the advanced concepts and technologies of chemistry, microbiology and life sciences in creating a happier and healthier human life in the 21st century.