Autor: Dexter, A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: A comparison of oxygen diffusion rates in sand moistened with water or PEG 20000 solution
Autorzy:: Hiller, S.
Dexter, A.R.
Powiązania:: https://bibliotekanauki.pl/articles/24419.pdf
Data publikacji:: 1997
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: sand
air
oxygen diffusion
polyethylene glycol
water
Źródło:: International Agrophysics; 1997, 11, 3
0236-8722
Pojawia się w:: International Agrophysics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Mechanical dispersion of clay from soil into water: readily-dispersed and spontaneously-dispersed clay
Autorzy:: Czyz, E.A.
Dexter, A.R.
Powiązania:: https://bibliotekanauki.pl/articles/24323.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: mechanical dispersion
clay
soil
water
readily-dispersed clay spontaneously-dispersed clay
Opis:: A method for the experimental determination of the amount of clay dispersed from soil into water is described. The method was evaluated using soil samples from agricultural fields in 18 locations in Poland. Soil particle size distributions, contents of organic matter and exchangeable cations were measured by standard methods. Sub-samples were placed in distilled water and were subjected to four different energy inputs obtained by different numbers of inversions (end-over-end movements). The amounts of clay that dispersed into suspension were measured by light scattering (turbidimetry). An empirical equation was developed that provided an approximate fit to the experimental data for turbidity as a function of number of inversions. It is suggested that extrapolation of the fitted equation to zero inversions enables the amount of spontaneously-dispersed clay to be estimated. This method introduces the possibility of replacing the existing subjective, qualitative method of determining spontaneously-dispersed clay with a quantitative, objective method. Even though the disper-sed clay is measured under saturated conditions, soil samples retaina ‘memory’ of the water contents at which they have been stored.
Źródło:: International Agrophysics; 2015, 29, 1
0236-8722
Pojawia się w:: International Agrophysics
Dostawca treści:: Biblioteka Nauki

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