חיפוש מתקדם
תחביר
חפש...
הספר "אוצר וולקני"
אודות
תנאי שימוש
ניהול
קהילה:
אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Discrepancies between soil solute concentration estimates obtained by TDR and aqueous extracts
Year:
1997
Authors :
נדלר, אריה
;
.
Volume :
35
Co-Authors:
Facilitators :
From page:
527
To page:
537
(
Total pages:
11
)
Abstract:

Soil moisture (&thgr;) changes modify the electrical conductivity of the soil solution (ECw) by varying the amount and composition of dissolved ions, their activity coefficients, and soil tortuosity. Theoretically expected, it was experimentally confirmed that the contribution of common reactions (precipitation–dissolution, adsorption–desorption, and complexation) to solute composition is not always a linear function of soil : water ratios. Using the driest or wettest q as references, correcting for dilution only when &thgr; changed, did not fully reconstruct the salinity. Bulk soil EC (ECa)–ECw linkage, based on the same mechanisms, is shown to have variable, curvilinear relations for soils of medium salinity levels, which are enhanced by the presence of sparingly soluble salts and clay content. An extreme disagreement between ECw and ECc (EC of 1 : 1 soil : water extracts adjusted for &thgr;) was found for a clay soil, where up to ~2 dS/m the slope was negative.

Note:
Related Files :
Aqueous extracts
dilution
leaching monitoring
salinity
soil
Soils
soil solution
Solutes
TDR, Time domain reflectometry
עוד תגיות
תוכן קשור
More details
DOI :
https://doi.org/10.1071/S96080
Article number:
0
Affiliations:
Database:
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
50614
Last updated date:
02/03/2022 17:27
Creation date:
30/09/2020 14:21
Scientific Publication
Discrepancies between soil solute concentration estimates obtained by TDR and aqueous extracts
35
Discrepancies between soil solute concentration estimates obtained by TDR and aqueous extracts

Soil moisture (&thgr;) changes modify the electrical conductivity of the soil solution (ECw) by varying the amount and composition of dissolved ions, their activity coefficients, and soil tortuosity. Theoretically expected, it was experimentally confirmed that the contribution of common reactions (precipitation–dissolution, adsorption–desorption, and complexation) to solute composition is not always a linear function of soil : water ratios. Using the driest or wettest q as references, correcting for dilution only when &thgr; changed, did not fully reconstruct the salinity. Bulk soil EC (ECa)–ECw linkage, based on the same mechanisms, is shown to have variable, curvilinear relations for soils of medium salinity levels, which are enhanced by the presence of sparingly soluble salts and clay content. An extreme disagreement between ECw and ECc (EC of 1 : 1 soil : water extracts adjusted for &thgr;) was found for a clay soil, where up to ~2 dS/m the slope was negative.

Scientific Publication
נגישות
menu      
You may also be interested in