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Dynamics of the cumulation of phosphorus, potassium, calcium and magnesium in developing seed of four soybean genotypes under the defined climatic conditions in the course of three years was observed. Samples were being taken at weekly intervals from the point at which the grain reached a size suitable to be analyzed up to the full maturity of the seed. By analyzing the results it was found out that the intense cumulation of the minerals tested took place during the stages III and IV of the seed development, that is, in the course of intense cumulation of dr)' matter and the most expressive metabolic activity in the seed. Investigation of the impact of climatic conditions provides evidence that cumulation of the tested macroelements has been favourably influenced by increased precipitation along with moderate air temperatures within the seed developing period. The highest content of the minerals found with the cultivar Maksimirka independently of the year investigated reveals that mineral cumulation in soybean seed is affected by the cultivar and genetic particularity.

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B. %BEPIC, L. BALINT and J. M O M I R O V I~-~U L J A TChromatographic-spectrophotometric method was used to determine the carotene content in the egg yolk of naturally raised chickens and in the eggs produced on poultry farms (Industrial production) for the winter and spring periods. The aim of the study was to find out if the industrial production of eggs causes changes in the carotene content of the egg yolk. Distinct differences were recorded in the carotene content in the egg yolk of eggs obtained from private producers and of those produced on poultry farms. for both periods. Considerable differences were recorded for the spring period: the carotene content in the yolk of eggs laid in natural environment, by chickens fed natural food, was 290% higher than that in the yolk of industrially produced eggs. The difference for the winter period was 152 %.