METHOD OF DETERMINING SIZE OF SYMBIOTIC NITROGEN FIXATION IN SOYBEAN IN FIELD ENVIRONMENT Russian patent published in 2014 - IPC A01H17/00 

FIELD: agriculture.

SUBSTANCE: invention relates to the field of agriculture. The invention is a method of determining the size of symbiotic nitrogen fixation in soybean in the field environment, comprising simultaneous sowing the soybean initial variety and the test culture, determining the dry biomass accumulation in the phase of mass flowering and complete ripeness of the plant, where the test culture is used as a mutant of soybean with ineffective tubercles, and a part of the symbiotic nitrogen in the soybean plants is determined by the difference between the dry biomass of the plants of the soybean variety under study with inefficient symbiosis and soybean mutant, not fixing nitrogen of the atmosphere, expressed as a percentage.

EFFECT: invention enables to determine reliably, fast (without determining the nitrogen content in plant samples) the amount of symbiotic nitrogen fixation by the part of biomass growth, to evaluate varietal responsiveness of soybean to inoculation.

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