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Information × Registration Number 0225U005301, (0124U000112) , R & D reports Title To develop measures to increase and protect the fertility of drained light-gray forest surface-glazed soils by optimizing the structural and aggregate state under long-term agrogenic load and climate changes in the conditions of the Carpathian region popup.stage_title Розробити заходи з підвищення та охорони родючості осушуваних ясно-сірих лісових поверхнево оглеєних ґрунтів шляхом оптимізації структурно-агрегатного стану за тривалого агрогенного навантаження і змін клімату в умовах Карпатського регіону Head Havryshko Oleh S., Кандидат сільськогосподарських наук Registration Date 30-12-2025 Organization Institute of Agriculture of the Carpathian Region of the National Academy of Agrarian Sciences of Ukraine popup.description1 To investigate ways of optimizing the structural-aggregate and micro-aggregate composition of drained light-gray forest surface-glazed soils under long-term agrogenic load and climate changes to increase their fertility and preserve the stability of agro-ecosystems in the war and post-war periods. popup.description2 For the first time in the Carpathian region, based on a long-term stationary experiment (1965) with dry sieving of the arable (0-20 cm) soil layer, it was established that in all fertilization systems, the lumpy and clumpy fraction (>10 mm) prevails. No significant changes in the percentage content of dry agronomically valuable aggregates 1-5 mm in size were observed under any load (<25%). Wet sieving proved the significant influence of the “Fertilizer” factor (Factual 2.900 > Theoretical 2.3223) on the optimization of the parameters of the structural-aggregate state. Thus, the separate application of lime (1.0 n HA), manure (10 t/ha of crop rotation area), and a full dose of mineral fertilizers (N65P68K68) to the soil contributes to the formation of excellent water resistance in it, and with the systematic application of organic-mineral fertilizers and lime (1.0 n HA), the number of water-resistant aggregates increases significantly (74 to 88%), which characterizes the soil structure as excessively high. Regression models were implemented, which confirmed that each increase in P₂O₅ and K₂O by 1 mg/kg of soil (regardless of the fertilization and utilization system) reduces the difference in sieving (wet–dry) of the <0.25 mm fraction by 0.0865% and 0.1284%, respectively (R² ≥ 0.82–0.89; p < 0.05). It was found that the long-term application of 10 t/ha of manure to the crop rotation area at the beginning of the 12th rotation of a four-field crop rotation significantly improved the microaggregate structure of the soil. At the same time, the proportion of large aggregates (1-0.25 mm) increased and the sum of fine fractions (<0.01 mm) decreased, while intensive mineral fertilization (N65P68K68), on the contrary, led to a sharp decrease in the average fraction of 0.25-0.05 mm fraction with a corresponding increase in the finer fraction 0.05-0.01 mm. Product Description popup.authors Partyka Tetiana V. Olifir Yurii M. Oksana P. Vashchyshyn Mariia M. Sokhanchak Svitlana A. Havryshko popup.nrat_date 2025-12-30 Close