A study by the Kazan State Agrarian University has identified specific varieties of spring grain crops that act as "carbon sinks," helping to reduce carbon dioxide emissions. The research, part of the carbon farming approach, found that three varieties of spring wheat and one of the 14 barley varieties have a positive balance of greenhouse gas accumulation in the soil. Spring triticale had the lowest carbon footprint among spring cereal crops, while the domestic soybean variety Samer 4 had the smallest carbon footprint. The research highlights the potential of selecting crop varieties with a minimal carbon footprint for sustainable agriculture and reducing greenhouse gas emissions.