Updating of "The Productivity Index of Pierce» and its application for an estimation of chernozem soils quality in the Right-bank Steppe of Ukraine
DOI:
https://doi.org/10.31073/acss88-04Keywords:
chernozem ordinary; chernozem southern; eroded soils; Productivity Index; soil qualityAbstract
Complex evaluation of soil quality is the necessary procedure in development of agrochemical, agro technology, phytosanitary, land betterment, soil-loss control and other actions in the course of the active land use. It is necessary also in procedures of cost assessment of farmlands, assessment of production activity of farms and crop divisions of the agricultural company and so forth. Development of procedures of adaptation to conditions of the Right-bank Steppe of Ukraine of the world of the Index Productivity of Pierce, popular in many countries, was the purpose of research. Modification of structure of this index, transformation of the WF-parameter based a regional ratio of cultivated area was separate tasks which follow from a goal, carrying out field research for definition of profile distribution beforehand of particular parameters of fertility and complex quality test as is full of profile ordinary and southern chernozems of watersheds, and eroded soils of slopes. The carried-out procedures of adaptation and calculations that eroded shortly profile soils have significantly smaller values of the Productivity Index in comparison with not eroded soils of watersheds showed. So when calculating on a layer of soil in 0-100 cm, the Index for chernozems ordinary, located on watersheds, was 10-17 % more than at the eroded soils: 0.69-0.64 on watersheds and 0.58-0.59 on slopes. As for the chernozems southern, the difference in values of the Productivity Index was larger: 0.68 on not eroded soils and 0.40 on eroded soils. This results from the fact that eroded soils have in general the inferior characteristics of bulk density, content of humus, the mobile phosphorus and exchange potassium. The greatest contrast between properties of eroded and not eroded soils in high layers, however with in deep soil layers this difference disappears is observed. The offered assessment procedure of soil quality by means of the modified Productivity Index in the Right-bank Steppe of Ukraine and in other erosive and dangerous regions with chernozem soils and larger share of slope lands can be used, as this index give objective coverage to change of soil fertility in the conditions of intensive manifestation of erosive processes.
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