The growth rate monitoring of crops throughout their biological cycle is very important as it contributes to the
achievement of a uniformly optimum production, a proper harvest planning, and reliable yield estimation. Fertilizer
application often dramatically increases crop yields, but it is necessary to find out which is the ideal amount that has to
be applied in the field. Remote sensing collects spatially dense information that may contribute to, or provide feedback
about, fertilization management decisions. There is a potential goal to accurately predict the amount of fertilizer needed
so as to attain an ideal crop yield without excessive use of fertilizers cause financial loss and negative environmental
The comparison of the reflectance values at different wavelengths, utilizing suitable vegetation indices, is commonly
used to determine plant vigor and growth. Unmanned Aerial Vehicles (UAVs) have several advantages; because they can
be deployed quickly and repeatedly, they are flexible regarding flying height and timing of missions, and they can obtain
very high-resolution imagery. In an experimental crop field in Eleftherio Larissa, Greece, different dose of pre-plant and
in-season fertilization was applied in 27 plots. A total of 102 aerial photos in two flights were taken using an Unmanned
Aerial Vehicle based on the scheduled fertilization.
Α correlation of experimental fertilization with the change of vegetation indices values and with the increase of the
vegetation cover rate during those days was made. The results of the analysis provide useful information regarding the
vigor and crop growth rate performance of various doses of fertilization.