Yun-Yang Chao graduated from National Taiwan University. He obtained PhD and M.S degree in National Taiwan University, Department of Agronomy. He worked as a postdoctoral fellow also in National Taiwan University; he executed and finished several projects, and published a lot of researches in nutrition deficiency and cadmium toxicity in rice seedlings. Presently he is working as a professor in Department of Plant Industry, National Pingtung University of Science and Technology.   Until now, he still has published several research papers in reputed international journals and research interest filed inculd crop production and management, crop stress physiology, nutrition deficiency, heavy metal toxicity and biofiterlizers.