In this paper have made the microbiological exam to several lots from different types of cereals taken from Timis, Arad and Caras-Severin districts, immediately after cropping and have pursued the evaluation of those parameters, according to the storage conditions in barns, in closed storerooms, in metal containers at a low temperature of approximately 4°C. As the value of the obtained results was very close for all the samples exposed to the same environmental conditions, the data from the tables represent the average of the obtained values.