The spatio-temporal trend of rapeseed yields in Ukraine as a marker of agro-economic factors influence
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Kuupäev
2020
Kättesaadavus
Ajakirja pealkiri
Ajakirja ISSN
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Kirjastaja
Abstrakt
The paper demonstrates the applicability of several statistical methods to the analysis
and interpretation of the average rapeseed yield data. It proves our hypothesis that the general
trend of rapeseed yield variations in Ukraine during 1991–2017 occurred due to agro-economic
and agro-technological factors, which are the determinants of the revealed general trend. The
temporal trend of rapeseed yield in most administrative districts can be described by a fourthdegree polynomial, namely, its characteristic points enabled us to describe and interpret the
dynamics of rapeseed yields. The absolute term of the polynomial shows the initial conditions of
the process, and its mapping allows us to identify the areas with the most favorable soil-climatic
conditions for the rapeseed cultivation. Indicators of the maximum rate of growth and decrease
of yields are the markers of stability of agro-ecosystems to the external influences. Therefore, the
mapping of the maximum rate of decline and increase of yields reveal areas in which yields
respond rapidly (increasing / falling) to the changes in agro-economic and agro-technological
conditions, as well as areas where yields are more stable and change gradually. Thus, the form of
the yield trend is determined by the influence of agro-technological and agro-economic factors,
whose contribution to the fluctuation in rapeseed yields varies from 53% to 90%.
Kirjeldus
Märksõnad
yield, rapeseed, trend, dynamics, variability, agro-economic factors, agro-technological factors, articles