The results of field experiments are highlighted, in which the influence of various factors on the specific nutrient uptake by winter wheat and spring barley varieties of various breeding periods cultivated on sod-podzolic soils was compared. These include the Mironovskaya 808 and Moskovsky 121 varieties, which dominated the Central part of the Russian Federation in the second half of the previous century, and the Moskovskaya 56 and NUR varieties, which are now widespread. The results of the study showed that modern varieties significantly exceed the previously zoned ones on highly cultivated soil in terms of yield when applying a high dose of mineral fertilizers. At the same time, the specific removal of nutrients was similar in both varieties; when cultivating the Mironovskaya 808 variety, one of the growing seasons was unfavorable, which had an impact on the final result.
S. A. Shafran (Wed,) studied this question.