Influence of oil radish under green manure application on the soil productivity index

Keywords: soil fertility, soil productivity, bio-organic fertilization, soil restoration, green manure fertilization system

Abstract

The aim of the study was to determine the effectiveness and feasibility of using oil radish as green manure in variants of intermediate summer utilization for the formation of the integrated indicator – the soil productivity index.Methods. The research was conducted during 2014–2025 at the experimental field of Vinnytsia National Agrarian University on gray forest soils with medium fertility potential. The experiment included four replications.Variant arrangement was systematic in two tiers. The experimental design provided for a comparative assessment of two consecutive technological variants: the control without green manure and the experimental variant with intermediate summer use of oil radish as green manure on the same plots, with alternation every two years to prevent potential phytotoxicity associated with cruciferous green manure crops.Results. For the 0–30 cm soil layer, averaged over the period 2014–2025, the comparative assessment between the no-green-manure variant and the variant with consistent green manure application of oil radish revealed the following average annual dynamics: humus content +0.0024%, soil bulk density -0.017 g cm-³, soil water-holding capacity +0.422%, pH +0.021, available phosphorus content +1.092 mg kg-1, exchangeable potassium content +1.242 mg kg-1, and soil electrical conductivity -0.001 dS m-1.Conclusions. The consistent green manure application of oil radish ensured an annual increase in the soil productivity index of +0.0112 per year. Therefore, oil radish is recommended for the unstable moisture zone of gray forest soils as a soil-improving and soil-rehabilitating green manure crop in the variant of intermediate summer technological application.

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Published
2025-11-28
Section
MELIORATION, ARABLE FARMING, HORTICULTURE