Particle size analysis measured using the improved integral suspension pressure method compared with the standard hydrometer method

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41330%2F24%3A98286" target="_blank" >RIV/60460709:41330/24:98286 - isvavai.cz</a>

Výsledek na webu

<a href="https://is.mendelu.cz/dok_server/slozka.pl?id=146632;download=323120" target="_blank" >https://is.mendelu.cz/dok_server/slozka.pl?id=146632;download=323120</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Particle size analysis measured using the improved integral suspension pressure method compared with the standard hydrometer method

Popis výsledku v původním jazyce

Soil texture is a fundamental soil characteristic. Due to the influence of soil particle distribution on almost all physical and chemical soil properties, it can be used to estimate other important soil characteristics such as hydraulic conductivity, water retention characteristics, parameters of retention curves and many others. Particle size analyses are performed using standard methods such as the pipette or hydrometer method. Currently, standard methods are being replaced by innovative automated methods, which may include automatic measurement of pressure changes in the suspension or laser analysis. The main objective of this study was to compare the standard hydrometer method with the automated improved integral suspension pressure method (ISP+) (Durner et Iden, 2021), which is based on the same physical principle (Stoke´s law). The measurements were performed on eight types of soil samples, namely two samples of sandy soil, four samples of silty soil, and two experimental mixtures - the first one prepared by mixing foundry sand (d50 = 0.14 mm) and micro-milled sand (d50 = 0.027 mm) in a 1:1 ratio, the second one was represented by pure kaolin clay. For each sample type 8 particle size analyses were performed – 4 by hydrometer method and 4 by ISP+. Therefore, overall, 64 particle size analyses were performed. The sample pretreatment for both methods was identical. The control reference density was calculated using the constant density based on the mass of the dissolved dispersant and the variable density of water as a function of temperature. The study results showed a good agreement between the ISP+ method and the hydrometer method, both in determining the clay fraction (R2 = 0,98; RMSE = 2,32 %) and in determining the sand (R2 = 0,99; RMSE = 2,75 %) and silt fraction (R2 = 0,98; RMSE = 2,89 %).

Název v anglickém jazyce

Particle size analysis measured using the improved integral suspension pressure method compared with the standard hydrometer method

Popis výsledku anglicky

Soil texture is a fundamental soil characteristic. Due to the influence of soil particle distribution on almost all physical and chemical soil properties, it can be used to estimate other important soil characteristics such as hydraulic conductivity, water retention characteristics, parameters of retention curves and many others. Particle size analyses are performed using standard methods such as the pipette or hydrometer method. Currently, standard methods are being replaced by innovative automated methods, which may include automatic measurement of pressure changes in the suspension or laser analysis. The main objective of this study was to compare the standard hydrometer method with the automated improved integral suspension pressure method (ISP+) (Durner et Iden, 2021), which is based on the same physical principle (Stoke´s law). The measurements were performed on eight types of soil samples, namely two samples of sandy soil, four samples of silty soil, and two experimental mixtures - the first one prepared by mixing foundry sand (d50 = 0.14 mm) and micro-milled sand (d50 = 0.027 mm) in a 1:1 ratio, the second one was represented by pure kaolin clay. For each sample type 8 particle size analyses were performed – 4 by hydrometer method and 4 by ISP+. Therefore, overall, 64 particle size analyses were performed. The sample pretreatment for both methods was identical. The control reference density was calculated using the constant density based on the mass of the dissolved dispersant and the variable density of water as a function of temperature. The study results showed a good agreement between the ISP+ method and the hydrometer method, both in determining the clay fraction (R2 = 0,98; RMSE = 2,32 %) and in determining the sand (R2 = 0,99; RMSE = 2,75 %) and silt fraction (R2 = 0,98; RMSE = 2,89 %).

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

40104 - Soil science

Projekt

<a href="/cs/project/QL24010263" target="_blank" >QL24010263: Smart nástroje pro řízení závlahových systémů a zlepšení vodní bilance zemědělských pozemků</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů