Soybean (Glycine max L.) is a globally recognized food crop for its high nutritional value, primarily due to its excellent protein and oil content. Its grains are also abundant in essential amino acids, polyunsaturated fatty acids, B vitamins, fiber, calcium, folic acid, and selenium. Additionally, soybean grains provide vital minerals such as magnesium, manganese, iron, and zinc. The unique biochemical composition of soybeans comprises proteins (49%) and fats (30%). The following research examined the seed oil and protein content of the exotic and local soybean cultivars cultivated as a recurrent crop in Uzbekistan. The study material included three each of the exotic Sparta and Selekta-201 (Russian selection), Nena (Kazakh selection), and local cultivars Ustoz-MMan-60, Toʻmaris-MMan-60, and Oyjamol, planted as repeated crops in 2020–2022 in the Samarkand and Navoi regions. In the environmental conditions of Uzbekistan, the highest seed oil and fat content were evident by sowing soybean as the main crop. However, as a repeated crop, the seed protein content was higher than the main crop.
Soybean (G. max L.), exotic and local cultivars, repeated crop, grain yield, seed oil, proteins, carbohydrates
The highest seed oil content resulted in the soybean (G. max L.) exotic cultivar Nena and local cultivar Oyjamol, planted as a repeated crop under the environmental conditions of Uzbekistan.