Comparison of particle size analysis using the standard hydrometer method and the improved integral suspension pressure method

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41330%2F24%3A98271" target="_blank" >RIV/60460709:41330/24:98271 - isvavai.cz</a>

Výsledek na webu

<a href="http://czuni.cz/?event=6th-international-symposium-of-soil-physics" target="_blank" >http://czuni.cz/?event=6th-international-symposium-of-soil-physics</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Comparison of particle size analysis using the standard hydrometer method and the improved integral suspension pressure method

Popis výsledku v původním jazyce

Soil texture is a key soil characteristic, and its knowledge can be used to estimate other important soil properties such as hydraulic conductivity, retention curve parameters, or available water for plants. 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. This paper compares the standard hydrometer method with the improved integral suspension pressure method (ISP+). The measurements were performed on four types of soil samples, namely two samples of sandy soil, one sample of silty soil, and one experimental mixture prepared by mixing foundry sand (d50 = 0.14 mm) and micro-milled sand (d50 = 0.027 mm) in a 1:1 ratio. Each sample type was measured 8 times (4x density method, 4x ISP+). Therefore, overall, 32 particle size analysis was performed. The same pretreatment of soil samples was used. 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 results indicate that the sand fraction reached almost identical values in all four soil sample types. The differences in sand fraction for both methods reached a maximum of 1.95%, with higher values measured by the ISP+ method in all samples. For the silt fraction, the most significant difference was measured in the sample with the experimental mixture, where an average of 4.05 % more silt particles were measured by the hydrometer method compared to the ISP+ method. For the clay fraction, a statistically significant difference was measured only for the one sample type (experimental mixture), where the hydrometer method completely ignored the low amount of clay fraction (the difference was 2 %). Overall, the results from both methods are very similar, and in most cases, the differences in the clay, silt, and sand fractions are not statistically significant. According to the results, it can be expected that the highest deviations will be measured in soils with a high proportion of the fine-grained fraction (clay or silt). However, to verify this statement, soil samples with a high proportion of clay particles should be measured using both methods. The measurements must be verified by another standard method (e.g., pipette method).

Název v anglickém jazyce

Comparison of particle size analysis using the standard hydrometer method and the improved integral suspension pressure method

Popis výsledku anglicky

Soil texture is a key soil characteristic, and its knowledge can be used to estimate other important soil properties such as hydraulic conductivity, retention curve parameters, or available water for plants. 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. This paper compares the standard hydrometer method with the improved integral suspension pressure method (ISP+). The measurements were performed on four types of soil samples, namely two samples of sandy soil, one sample of silty soil, and one experimental mixture prepared by mixing foundry sand (d50 = 0.14 mm) and micro-milled sand (d50 = 0.027 mm) in a 1:1 ratio. Each sample type was measured 8 times (4x density method, 4x ISP+). Therefore, overall, 32 particle size analysis was performed. The same pretreatment of soil samples was used. 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 results indicate that the sand fraction reached almost identical values in all four soil sample types. The differences in sand fraction for both methods reached a maximum of 1.95%, with higher values measured by the ISP+ method in all samples. For the silt fraction, the most significant difference was measured in the sample with the experimental mixture, where an average of 4.05 % more silt particles were measured by the hydrometer method compared to the ISP+ method. For the clay fraction, a statistically significant difference was measured only for the one sample type (experimental mixture), where the hydrometer method completely ignored the low amount of clay fraction (the difference was 2 %). Overall, the results from both methods are very similar, and in most cases, the differences in the clay, silt, and sand fractions are not statistically significant. According to the results, it can be expected that the highest deviations will be measured in soils with a high proportion of the fine-grained fraction (clay or silt). However, to verify this statement, soil samples with a high proportion of clay particles should be measured using both methods. The measurements must be verified by another standard method (e.g., pipette method).

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