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The accumulation of phytic acid with relation to the deposition of the protein component in grain during maturation of three maize varieties grown under the same topographical and agrotechnical conditions over 2 crop years was investigated. Phytic acid was determined by the spectrophotometric method of Mohamed et al. (1986). Phytic acid content increased significantly (P = 0.05) up until the late stage of dough grain maturity. Afterwards, until full grain maturity, no significant changes of phytic acid content have been obtained. At the same time, changes of phytic acid content expressed on a dry matter basis correlate highly significantly (P = 0.001) and negatively with total nitrogen in both vegetation years (r = ‐0.848 and r = ‐0.845) and alpha‐aminonitrogen content (r=‐0.799 and r = ‐0.792), but highly significantly (P = 0.001) and positively with prolamine content (r = 0.823 and 0.654). Grain maturation under conditions of increased moisture and lower temperature resulted in lower phytic acid level.

New criteria for the evaluation of wheat qualitative properties are worked out on the basis of the study of the shape and size of the extensographic curves. Approximating the experimental curvesextensogramsto the theoretical curves which are the closest to them in their shape and equal to them in their area, it also was possible to determine their shape parameters. The theoretical curve is an ellipse inscribed over the shape of the experimental curve. It changes its shape to the case when the ellipse eccentricity becomes equal to zero and further when x-axis and y-axis exchange their places in the coordinate system. It has been determined that the extensogram area can be the best means of measuring the wheat flour quality if it has been evaluated with reference to the curve circumference which circumscribes it. The ratio of the parameters of the theoretical curve maximum (mt) and the maximum of the theoretical curve of the ideal shape (r) is the basis for the extensogram evaluation and their classification into the qualitative range. The quantitative data of the ratio mdr indicate the shape, and the values for r indicate the extensogram size. On the basis of the expression (m&-l)lOO, it is possible to evaluate accurately the extensographic curves for the first time as well as to classify wheat into the qualitative range.

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The dynamics of the cumulation of iron, copper and sodium with four genotypes of soybean cultivated in the same topographical and agrotechnical conditions during three years was followed. Sampling was done in weekly intervals until complete maturity of seed. It was found out that the most intense cumulation took place during the seed development stages III and IV at the time of mostly expressed metabolic activity of the seed. The absolute values of the contents were increasing along with seed maturing and maximums were reached by the end of the stage IV or rather by the beginning of the seed development stage V. Although the dynamics of cumulation regardless of the year of investigation was equal with all the genotypes the analysis of the impact of climatic factors showed that higher precipitation at the period of seed development along with moderate air temperature affected mineral cumulation. Similarly, the highest contents of iron, copper and sodium observed with the genotypes Srecka and Maksimirka point out that the cumulation of the investigated minerals in soybean seed is affected by genetic particularity.