Abstract
In modern nutrition, bioactive materials of different vegetables are especially important to be researched. The experiment was carried out on March 30, 2016 (sowing date). Mineral element content (B, Ca, Cu, Fe, K, Mg, Na, P, S, Zn) was evaluated on the 60th, 85th and the 105th day of the vegetation period. The data are presented as the mean of five varieties which can give the real state of these parameters of beetroot grown on lowland chernozem soil.
 In the young beetroot leaves (60 days) the mineral element content was higher than in the older ones (85 days). The calcium and magnesium content of the leaves was much more favourable (10 times higher) than in the root. The potassium content of leaves has reached the amount of 5000 mg kg-1, but at the same time more than 3000 mg kg-1 was detected in the improved root. This value is favourable for the potassium supply of the human organism.
 The sulphur content (1300 mg kg-1) of the leaves was the highest on the 85th day of vegetation period. Similar tendency was detected for boron content (2.45 mg kg-1), while for iron content it was higher (28.23 mg kg-1) in the younger leaves (60 days).
 Finally, it can be concluded that the increased element content of beetroot leaves will be a favourable source of mineral element supply of the human organism.
Highlights
The beetroot (Beta vulgaris ssp. esculenta var. rubra L.) belongs to the Chenopodiaceae family
The history of soil mapping, with particular emphasis on salt-affected, soils is a history of competition between two paradigms, one of quantitative appraisal of soil properties, mainly salinity and the other, of categorical delineation of patches of similar pedons
During the history of soil science first categorical maps were compiled, but salt-affected soils were the first being spatially represented by quantitative maps
Summary
The beetroot (Beta vulgaris ssp. esculenta var. rubra L.) belongs to the Chenopodiaceae family. Its progenitor the wild form of Beta vulgaris L. var. Varieties with short vegetation have small or middle leaf lengths which can promote the intensive root development. The history of soil mapping (see Várallyay, 1989 on earlier developments in Hungary), with particular emphasis on salt-affected, soils is a history of competition between two paradigms, one of quantitative appraisal of soil properties, mainly salinity and the other, of categorical delineation of patches of similar pedons. Quantitative maps deliver directly understandable message for the users, such maps are suited only for a limited number of soils, among which salt-affected soils are the most prominent, since their main features: salinity, sodicity and alkalinity are all quantifiable characteristics (Arany, 1956). During the history of soil science first categorical maps were compiled, but salt-affected soils were the first being spatially represented by quantitative maps. Such research lasted until the nineteen-eighties and slowed down to the current pace
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