METHOD FOR DETERMINING RESISTANCE OF FLAX GENOTYPES TO VARIATIONS IN ACIDITY OF SOIL SOLUTION Russian patent published in 2008 - IPC A01H1/04 

FIELD: agriculture, in particular, fiber flax selection and cultivation process.

SUBSTANCE: method involves growing plants on three backgrounds with different acidity levels (pH_KCl) - I- 4.5 and lower (basic soil) high acidity background, II - 5.5 - low acidity background, III - 7.0 - neutral acidity background, said acidity levels being provided by applying lime immediately under flax and thorough mixing with soil to plow depth, at the rate providing predetermined value of pH_KCl, using empirically produced coefficient for shifting by 0.1 pH - 0.31 t/hectare CaCO₃ for slightly loamy soils and 0.40 t/hectare for average loamy soils; analyzing variations in main productivity parameters (fiber weight, fiber content, number of seeds per one plant) and ranging samples under test into groups: adapted for various acidity levels, resistant to neutral reaction of substrate, resistant to heavily acid reaction, and non-resistant to variations in acidity levels).

EFFECT: quick and effective determining of flax genotypes resistant to variations in soil solution acidity.

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