Abstract
The article presents the results of research on the influence of microbial biopreparations on the growth, development, and forage value of sweet clover (Melilotus spp.) under the conditions of risk-prone agriculture in the Akmola region. The aim of the study was to determine the effectiveness of microbiological agents in organic farming to increase crop productivity and improve the biochemical composition of plants. The field experiments were carried out on heavy loamy chernozem soils at the “Kokshetau Experimental Production Facility” LLP during 2024–2025. Modern microbial compositions were used as biological products to supply plants with available forms of nitrogen and phosphorus and to enhance their stress tolerance. The obtained results showed that the application of biopreparations increased the nutrient content in the dry matter of sweet clover and improved growth parameters compared with the control treatment. The use of biological products in sweet clover cultivation technology enhances crop productivity, improves forage quality, and contributes to the development of environmentally sustainable agroecosystems. The conducted studies confirm the prospects of applying microbial biopreparations as an effective and safe tool for resource-efficient agriculture in the conditions of Northern Kazakhstan.