Grain is transported to and from grain collecting centres and elevators in lorries, railroad wagons, marine or river vessels. Grain is stored in individual lots. The LOT usually means any amount of grain of uniform quality (judged on the basis of organoleptic properties) intended for simultaneous reception, unloading or storage in one silo bin or warehouse. It is the grain lot that usually represents the object of study. During its assessment, however, one has to take into account a major property of grain mass - its heterogeneity.