Abstract
This chapter describes an isotopic method for determining the distribution of chemicals in agricultural aviation. The labeling of solid chemicals by active tracers is carried out during their loading to the aircraft container. The aqueous or water–alcohol solution of a tracer is spread under pressure, and covers the pouring grains of chemicals. The speed of pouring grains must be correlated with the feeding speed of spread tracer, because the given active solution must cover the given mass of grains of chemicals. Labeling of liquid chemicals is easy. Tracer must be added to the liquid and mixed together carefully. The agricultural aircraft is equipped with containers for liquids and also with a mixing set. The standard sample of active solid or liquid chemicals, being the basis for the calculation and intensity of radiation-mass of chemicals, must be taken after every labeling process of a substance. It is easy to pour it to the vessel of a known volume. Knowing the bulk density of a solid, or the specific gravity of a liquid, and of course the volume of the vessel, the amount of a standard sample can be found.
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