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This paper presents a method of prognosis of organic matter content evolution in a
plane agricultural surface soil, using the information obtained by initial scanning with
spectrophotometrical techniques. The scanning result — map of organic matter content distribution — is
used as initial moment distribution for calculating the evolution of soil organic matter content in terms
of time. In order to calculate the evolution in time of organic matter quantity, mathematical models
described by differential equations known in specialty literature are used: Willigen et al. (2008 are
used. .Knowing this evolution, we are able to evaluate the optimum moment applying and the fertilizer
quantity necessary for obtaining the appropriate parameters of soil nutrients. Therefore, this method
aims at predicting the evolution of organic matter content in an agricultural soil, on a plane surface, for
being able to add in due time the chemical fertilizers treatments needed.
