Determination of soil grain size composition by measuring apparent weight of float submerged in suspension
Jarosław Kaszubkiewicz , Witold Wilczewski , Tibor József Novák , Przemysław Woźniczka , Krzysztof Faliński , Jerzy Belowski , Dorota Kawałko
AbstractTexture is one of the most significant physical properties of soils. Over the years, several methods of its measuring were developed. The paper presents a method for determining the particle size composition of soils, based on the separation of particles in the sedimentation process. Density of suspension is determined on the basis of apparent weight changes of a float submerged in it. The weight of the float suspended on a thin line, at a given depth in the suspension, is measured with a sensitive piezoelectric dynamometer. The Stokes equation is used to calculate the content of soil fractions with equivalent diameters in the range of 0.001 to 0.1 mm. Digital transmission of results from the dynamometer, the temperature sensor and measurements of the distance defining the depth of immersion of the float to the computer enable calculations of particle size composition to be performed automatically. This paper presents the results of measurements of the particle size composition of artificially generated mixtures of 'silt' and 'clay'. The results are compared with results obtained with other methods (including the laser method). A high level of repeatability of the results and satisfactory compatibility in relation to the reference pipette method are noted.
|Journal series||International Agrophysics, ISSN 0236-8722, (A 25 pkt)|
|Publication size in sheets||0.55|
|Keywords in English||Sedimentation; Particle size composition; Soil suspension density|
|ASJC Classification||; ; ;|
|Internal identifier||62719; PX-58ff19d9d5deb42d9dea9c57|
|License||Journal (articles only); published final; ; after publication|
|Score||= 25.0, 05-06-2020, ArticleFromJournal|
|Publication indicators||= 5; = 4; : 2017 = 0.871; : 2017 = 1.242 (2) - 2017=1.267 (5)|
|Citation count*||6 (2020-05-31)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.