RADIO-WAVE METHOD FOR REMOTE DETERMINATION OF CLAY FRACTION CONTENT IN SOILS Russian patent published in 2021 - IPC G01N22/04 G01N33/24 

FIELD: physics.

SUBSTANCE: disclosed is a radio-wave method for remote determination of content of a clay fraction in soil, characterized by the fact that a nadir is measured at frequency 433 MHz of reflection coefficient from soil, not covered with vegetation, with moisture content exceeding maximum content of bound water, and weight fraction of clay fraction C in soil is determined from the ratio: C = 124.435-68.027∙(1+10^Rdb/20)/(1-10^Rdb/20)-115,095∙ln{(Rdb+2.265)/-10.673}, where C is mass fraction of content of clay fraction in soil (particles with size of less than 0.002 mm), Rdb is modulus of amplitude of reflection coefficient, expressed in dB.

EFFECT: technical result is simplification of procedure for measurement of naturally folded soil in field conditions without the need to sampling soil cover, as well as high measurement performance (measurement speed is limited by the speed of the vector network analyser used in field conditions).

1 cl, 4 dwg, 1 ex