This Manuscript "Guide to Conducting an Agronomic Experiment", is a work, which deals with the intellectual baggage that the researcher must acquire, the different types of experiments that he should have in mind, the terms that are commonly used in this field and the different types of experimental devices with their modes of drawing, conditions of use, advantages and disadvantages and the determination of their degree of freedom (ddl). This manuscript does not deal with the analysis of data from these experimental devices. The details of each of these experimental devices are supported by examples to facilitate the understanding of the reader (researcher).