Abstract
The article examines the economic feasibility of using microbial and phytohormonal biopreparations in organic soyabean production in Ukraine under the conditions of climatic instability and market fluctuations. The aim of the study was to conduct a comprehensive economic assessment of the profitability of biotechnological cultivation schemes for the Khorol soyabean variety using biopreparations of different origins - Profix, Mycofriend and Violar - implemented over three years (2022–2024), taking into account the level of costs, organic product prices, and hydrothermal conditions. The study also sought to develop an adaptive model for choosing the optimal strategy for organic soyabean producers. The methodology is based on a combination of cost analysis, profitability sensitivity to price scenarios €475–661 per tonne, yield variation coefficients, as well as strategic grouping of schemes according to the “income-risk” criteria. The developed heat map and strategic matrices enabled the formulation of flexible recommendations based on financial capacities and market price expectations. It was found that the combined schemes (in particular, Mycofriend + Profix + Violar) demonstrate not only the maximum yield (3.23 t ha−1) and the highest profitability (369%), but also the lowest level of yield fluctuation (CV=9.7%), which indicates their adaptability to hydrothermal stress. At the same time, some monocomponent options (Profix, Control) had unstable yields with a low level of profitability. Based on multi− criteria analysis, a Decision Matrix Model was proposed that combines producer goals, climatic expectations, and market prices of products.