Titratable Acidity at pH = 7 Estimated from the pH of a Soil:Buffer Mixture
The value of titratable acidity in soil pH = 7 (AT_pH7) is used for taxonomic purposes and to estimate lime requirement. AT_pH7 could be predicted by the pH value of the mixture soil:buffer solution (pH_equilibrium). Calcium acetate buffered at pH = 7 was added to each sample and pH_equlibrium and alkali required to reach pH = 7 were measured. With pH_equilibrium the AT_pH7 was estimated by regression (AT_eq) and by the amount of alkali neutralized to achieve pH_equilibrium (AT_OH). There was an acceptable fit between AT_pH7, AT_eq and AT_OH, but their differences were not normally distributed. Both, AT_OH and AT_eq, underestimated the AT_pH7 average. The pH_equilibrium value was more accurate than AT_pH7, while AT_eq and AT_OH measurements were less accurate. The use of AT_OH and AT_eq did not introduce significant errors in classifying the soils by their saturation in bases. Both measurements wereperformed in a shortertime than AT_pH7.
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Digital revista |
| Language: | spa |
| Published: |
Coeditada entre Facultad de Agronomía - Udelar y el Instituto Nacional de Investigación Agropecuaria (INIA)
2017
|
| Online Access: | https://agrocienciauruguay.uy/index.php/agrociencia/article/view/181 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| id |
oai:oai.agrocienciauruguay.uy:article-181 |
|---|---|
| record_format |
ojs |
| spelling |
oai:oai.agrocienciauruguay.uy:article-1812022-12-09T20:01:43Z Titratable Acidity at pH = 7 Estimated from the pH of a Soil:Buffer Mixture Acidez titulable a pH = 7 estimada a partir del pH de una mezcla suelo:buffer Beretta, Andrés Nicolás Bassahun, Daniel Torres, Deborah Musselli, Raquel García, Leticia saturated soil desaturated soil cation exchange capacity base saturation potential acidity suelo saturado suelo desaturado capacidad intercambio catiónico saturación en bases acidez potencial The value of titratable acidity in soil pH = 7 (AT_pH7) is used for taxonomic purposes and to estimate lime requirement. AT_pH7 could be predicted by the pH value of the mixture soil:buffer solution (pH_equilibrium). Calcium acetate buffered at pH = 7 was added to each sample and pH_equlibrium and alkali required to reach pH = 7 were measured. With pH_equilibrium the AT_pH7 was estimated by regression (AT_eq) and by the amount of alkali neutralized to achieve pH_equilibrium (AT_OH). There was an acceptable fit between AT_pH7, AT_eq and AT_OH, but their differences were not normally distributed. Both, AT_OH and AT_eq, underestimated the AT_pH7 average. The pH_equilibrium value was more accurate than AT_pH7, while AT_eq and AT_OH measurements were less accurate. The use of AT_OH and AT_eq did not introduce significant errors in classifying the soils by their saturation in bases. Both measurements wereperformed in a shortertime than AT_pH7. El valor de acidez titulable a pH = 7 en suelo (AT_pH7) se utiliza con fines taxonómicos y para estimar la necesidad de encalado. Es posible predecir AT_pH7 por el valor de pH de la mezcla suelo:solución buffer (pH_equilibrio). A cada muestra se le agregó acetato de calcio buffereado a pH = 7, se midió el pH_equilibrio y el álcali necesario para llegar a pH=7. Con pH_equilibrio se estimó AT_pH7 por regresión (AT_eq) o por la cantidad de álcali neutralizado para alcanzar el pH_equilibrio (AT_OH). Existió un ajuste aceptable entre AT_pH7, AT_eq y AT_OH, pero sus diferencias no tuvieron distribución normal. Con AT_OH y AT_eq, se subestimó el promedio de AT_pH7. El valor de pH_equilibrio fue más preciso que AT_pH7, en tanto que las medidas AT_eq y AT_OH tuvieron menor precisión. Al utilizar AT_eq y AT_OH, no se introdujeron errores significa-tivos al clasificar los suelos por su saturación en bases. Ambas mediciones se realizaron en menor tiempo que AT_pH7. Coeditada entre Facultad de Agronomía - Udelar y el Instituto Nacional de Investigación Agropecuaria (INIA) 2017-06-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://agrocienciauruguay.uy/index.php/agrociencia/article/view/181 10.31285/AGRO.21.1.12 Agrociencia Uruguay; Vol. 21 No. 1 (2017); 105- 108 Agrociencia Uruguay; Vol. 21 Núm. 1 (2017); 105- 108 Agrociencia Uruguay; v. 21 n. 1 (2017); 105- 108 2730-5066 spa https://agrocienciauruguay.uy/index.php/agrociencia/article/view/181/160 Copyright (c) 2017 Agrociencia Uruguay http://creativecommons.org/licenses/by/4.0 |
| institution |
UDELAR |
| collection |
OJS |
| country |
Uruguay |
| countrycode |
UY |
| component |
Revista |
| access |
En linea |
| databasecode |
rev-agrociencia-uy |
| tag |
revista |
| region |
America del Sur |
| libraryname |
Biblioteca de la Facultad de Agronomía de la UDELAR de UY |
| language |
spa |
| format |
Digital |
| author |
Beretta, Andrés Nicolás Bassahun, Daniel Torres, Deborah Musselli, Raquel García, Leticia |
| spellingShingle |
Beretta, Andrés Nicolás Bassahun, Daniel Torres, Deborah Musselli, Raquel García, Leticia Titratable Acidity at pH = 7 Estimated from the pH of a Soil:Buffer Mixture |
| author_facet |
Beretta, Andrés Nicolás Bassahun, Daniel Torres, Deborah Musselli, Raquel García, Leticia |
| author_sort |
Beretta, Andrés Nicolás |
| title |
Titratable Acidity at pH = 7 Estimated from the pH of a Soil:Buffer Mixture |
| title_short |
Titratable Acidity at pH = 7 Estimated from the pH of a Soil:Buffer Mixture |
| title_full |
Titratable Acidity at pH = 7 Estimated from the pH of a Soil:Buffer Mixture |
| title_fullStr |
Titratable Acidity at pH = 7 Estimated from the pH of a Soil:Buffer Mixture |
| title_full_unstemmed |
Titratable Acidity at pH = 7 Estimated from the pH of a Soil:Buffer Mixture |
| title_sort |
titratable acidity at ph = 7 estimated from the ph of a soil:buffer mixture |
| description |
The value of titratable acidity in soil pH = 7 (AT_pH7) is used for taxonomic purposes and to estimate lime requirement. AT_pH7 could be predicted by the pH value of the mixture soil:buffer solution (pH_equilibrium). Calcium acetate buffered at pH = 7 was added to each sample and pH_equlibrium and alkali required to reach pH = 7 were measured. With pH_equilibrium the AT_pH7 was estimated by regression (AT_eq) and by the amount of alkali neutralized to achieve pH_equilibrium (AT_OH). There was an acceptable fit between AT_pH7, AT_eq and AT_OH, but their differences were not normally distributed. Both, AT_OH and AT_eq, underestimated the AT_pH7 average. The pH_equilibrium value was more accurate than AT_pH7, while AT_eq and AT_OH measurements were less accurate. The use of AT_OH and AT_eq did not introduce significant errors in classifying the soils by their saturation in bases. Both measurements wereperformed in a shortertime than AT_pH7. |
| publisher |
Coeditada entre Facultad de Agronomía - Udelar y el Instituto Nacional de Investigación Agropecuaria (INIA) |
| publishDate |
2017 |
| url |
https://agrocienciauruguay.uy/index.php/agrociencia/article/view/181 |
| work_keys_str_mv |
AT berettaandresnicolas titratableacidityatph7estimatedfromthephofasoilbuffermixture AT bassahundaniel titratableacidityatph7estimatedfromthephofasoilbuffermixture AT torresdeborah titratableacidityatph7estimatedfromthephofasoilbuffermixture AT musselliraquel titratableacidityatph7estimatedfromthephofasoilbuffermixture AT garcialeticia titratableacidityatph7estimatedfromthephofasoilbuffermixture AT berettaandresnicolas acideztitulableaph7estimadaapartirdelphdeunamezclasuelobuffer AT bassahundaniel acideztitulableaph7estimadaapartirdelphdeunamezclasuelobuffer AT torresdeborah acideztitulableaph7estimadaapartirdelphdeunamezclasuelobuffer AT musselliraquel acideztitulableaph7estimadaapartirdelphdeunamezclasuelobuffer AT garcialeticia acideztitulableaph7estimadaapartirdelphdeunamezclasuelobuffer |
| _version_ |
1756201874490392577 |