Abstract
The issue of optimal seeding rates of spring wheat varieties in extreme conditions of Karakalpakstan is considered. The studies were carried out in 2019–2020 with 3 varieties of spring wheat with different agroecotypes: Saratovskaya-29, Semurg and Zhanub gavhari. Sowing was carried out with 10 row plots with a row spacing of 15 cm. The plot length was 10 m, width — 1.5 m. The plant nutrition area was changed by thickening them in the plot. As a result of the work, it was revealed that in the soil and climatic conditions of Karakalpakstan, the most optimal ratios between biomass and grain weight in plants are manifested in crops with a plant density of 450–500 plants per 1 m2, which corresponds to seeding rates of 180–200 kg/ha.
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