English to Russian Science Agriculture

Модель прогнозирования урожайности сельхозкультур. Контекст:
1.2.6 Step 5 – partitioning of biomass (B) into yield (Y) ( как этот шаг5 перевести?) Разбиение биомассы в ......?

Beyond the partitioning of biomass into yield (Step 5), there is no partitioning of above-ground biomass among various organs. This choice avoids dealing with the complexity and uncertainties associated with the partitioning processes, which remain among the least understood and most difficult to model;
5. Partitioning of biomass into yield (Y). Given the simulated above ground biomass (B), crop yield is obtained with the help of the Harvest Index (Eq. 1.1c). In response to water and/or temperature stresses, HI is continuously adjusted during yield formation.