The Slavyanochka soy variety represents an early-maturing indeterminate plant type of medium height, varying from low to medium, with an upright or semi-upright stem. Plant height reaches approximately 72.6 cm, and the attachment of the lower pod is located at a height of about 13 cm. Leaves are compound with pointed-ovate leaflets, and the flowers are white. Seeds are small, elongated-flattened, predominantly yellow in color with a yellow or dark-brown hilum. The mass of 1000 seeds varies from 136.6 to 173 g, indicating some variability in characteristics depending on the growing region.
The vegetative period of the variety is about 107-110 days, which allows it to be considered a very early or early variety. Protein content in seeds reaches 30.5-35.0%, and fat content is 18-22.6%, making this variety valuable for obtaining high-protein and high-fat raw materials. Yield of the variety varies depending on the region: in the Central Black Earth region, the average yield is about 25.8 c/ha with a maximum up to 39.5 c/ha; in the Nizhny Novgorod region, the average yield is 12.5 c/ha, and the maximum is 31.6 c/ha.
Studies conducted under conditions of erosion-prone slopes in the black soils of Rostov region showed that the highest yield of the Slavyanochka variety is achieved using chisel primary soil tillage and applying mineral fertilizers at the rate of N84P30K48. At the same time, higher fertilizer profitability is observed at the rate of N46P24K30, which provides an increase in yield within 3.20-3.50 kg for each kilogram of applied fertilizers. These data indicate the good adaptability of the variety to various agronomic conditions and the possibility of increasing productivity through optimization of soil tillage and nutrition.
