Oligo- Element concentration of the Avocado ' Fuerte ' in Morocco - results leaf analysis

The fertilization operation of avocado trees must take into account the chemical composition of environmental soil and chemical elements of plant leaves. However, in Morocco, farmers don’t know well cultural techniques of avocado cultivation. Indeed most of them rely on the qualitative and quantitative fertilization applied to other types of trees. In this study, we assess the nutritional status of the Avocado variety called "fuerte" with some chemical elements. For this purpose we use leaf technical analysis to measure concentrations of these elements in avocado so that we can determine the quantity of every element needed by the tree. The results show that the different orchards studied did not suffer from the same deficits or excesses of the chemical elements studied. So, the application of this technique is so interesting for the culture of avocado and the respect for the environment. Keywords: Avocado, fertilization, leaf analysis, ‘Fuerte’ variety, Morocco