Plant nutrient diagnosis can forecast and evaluate fertilizer effectiveness and assist in adjusting fertilization of plants. Eucalyptus urophylla is a tree species that has many advantages, such as fast growth, resistance to aridity, multiple uses and is widely planted in south China. How to apply fertilizers appropriately for Eucalyptus urophylla is a question in the area. The aim of this study was to compute indices for the nutrients N, P, K, Ca, Mg, B related to the volume of Eucalyptus urophyl...