We studied the content and distribution of mobile forms of phosphorus, determined by various methods (by Kirsanov, Machigin, Chirikov, Karpinsky-Zamjatina, Skofild). The quantity of mobile phosphorus depends on various soil parameters multicollinearly. Consequently, it is desirable to use a non-parametric method, in particular cluster analysis, for the evaluation of content and distribution of mobile forms phosphorus. Phosphate regime of soils depends on the composition of the parent soil rock and soil genesis processes. The fertilizer can significantly change content and spatial distribution of mobile forms of phosphorus. The choice of methods for determining phosphorus in soils remains a problem. It is therefore necessary to consider not only guidelines but also the ultimate goal of the study. The problem of Phosphorus has two aspects. First, it is a violation of the global Phosphorus cycle as a result of anthropogenic impacts, which leads to environmental problems. Secondly, using of Phosphorus as needed for agricultural production element. Its assessment, in one and in the other cases, is impossible without the relevant method of Phosphorus determination. We studied the content and distribution of mobile forms of Phosphorus, determined by Kirsanov, Machigin, Chirikov, Karpinsky — Zamjatina, Skofild. We investigated soil series (Phaeozem — Chernozem) on different terrain (slope — foot of the slope — plain) for agroecosystems of various degrees of anthropogenic load. For the distribution of Phosphorus by soil profiles it is established that its maximum is in the parent material. Only for meadow-chernozem, where phosphorus fertilizers are used the most commonly, the higher amount of Phosphorus is in the upper horizons. An important role for the redistribution of Phosphorus is played by the processes of illuviation, gleying and biogenic migration. The quantity of mobile Phosphorus depends multicollinearly on various soil parameters, primarily the soil acidity, the content of organic matter and the soil-absorbing complex. Consequently, it is desirable to use a non-parametric method, in particular cluster analysis, for the evaluation of content and distribution of mobile forms Phosphorus. Phosphate regime of soils depends on the composition of the parent soil rock and soil genesis processes. The fertilizer can significantly change content and spatial distribution of mobile forms of Phosphorus. The choice of methods for determining Phosphorus in soils remains a problem. It is therefore necessary to consider not only guidelines but also the ultimate goal of the study.

Исследовано содержание и перераспределение подвижных форм фосфора. Установлено, что их количество мультиколлинеарно зависит от показателей почв. Доказана мотивированность применения не только корреляционного анализа, но и непараметрических методов оценки, в том числе кластерного анализа. Обосновано, что фосфатное состояние почв зависит от состава материнской породы и процессов почвогенезиса. Освещено, что удобрение может существенно изменять как содержание, так и пространственное распределение подвижных форм фосфора.

Досліджено вміст та перерозподіл рухомих форм фосфору. Встановлено, що їх кількість мультиколінеарно залежить від показників ґрунтів. Доведено вмотивованість застосування не тільки кореляційного аналізу, але й непараметричних методів оцінювання, зокрема кластерного аналізу. Обґрунтовано, що фосфатний стан ґрунтів залежить від складу материнської породи та процесів ґрунтогенезу. Висвітлено, що удобрення може істотно змінювати як уміст, так і просторовий розподіл рухомих форм фосфору.