The efficiency of different estimation methods of hydro-physical limits
The soil water available to crops is defined by specific values of water potential limits. Underlying the estimation of hydro-physical limits, identified as permanent wilting point (PWP) and field capacity (FC), is the selection of a suitable method based on a multi-criteria analysis that is not alw...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Ciência do Solo
2012-12-01
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| Series: | Revista Brasileira de Ciência do Solo |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000600009&lng=en&tlng=en |
| _version_ | 1819059099058307072 |
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| author | Emma María Martínez Tomas Serafín Cuesta Javier José Cancela |
| author_facet | Emma María Martínez Tomas Serafín Cuesta Javier José Cancela |
| author_sort | Emma María Martínez |
| collection | DOAJ |
| description | The soil water available to crops is defined by specific values of water potential limits. Underlying the estimation of hydro-physical limits, identified as permanent wilting point (PWP) and field capacity (FC), is the selection of a suitable method based on a multi-criteria analysis that is not always clear and defined. In this kind of analysis, the time required for measurements must be taken into consideration as well as other external measurement factors, e.g., the reliability and suitability of the study area, measurement uncertainty, cost, effort and labour invested. In this paper, the efficiency of different methods for determining hydro-physical limits is evaluated by using indices that allow for the calculation of efficiency in terms of effort and cost. The analysis evaluates both direct determination methods (pressure plate - PP and water activity meter - WAM) and indirect estimation methods (pedotransfer functions - PTFs). The PTFs must be validated for the area of interest before use, but the time and cost associated with this validation are not included in the cost of analysis. Compared to the other methods, the combined use of PP and WAM to determine hydro-physical limits differs significantly in time and cost required and quality of information. For direct methods, increasing sample size significantly reduces cost and time. This paper assesses the effectiveness of combining a general analysis based on efficiency indices and more specific analyses based on the different influencing factors, which were considered separately so as not to mask potential benefits or drawbacks that are not evidenced in efficiency estimation. |
| first_indexed | 2024-12-21T14:05:42Z |
| format | Article |
| id | doaj.art-0807389f3d774c8ab15a263da35f020f |
| institution | Directory Open Access Journal |
| issn | 1806-9657 |
| language | English |
| last_indexed | 2024-12-21T14:05:42Z |
| publishDate | 2012-12-01 |
| publisher | Sociedade Brasileira de Ciência do Solo |
| record_format | Article |
| series | Revista Brasileira de Ciência do Solo |
| spelling | doaj.art-0807389f3d774c8ab15a263da35f020f2022-12-21T19:01:14ZengSociedade Brasileira de Ciência do SoloRevista Brasileira de Ciência do Solo1806-96572012-12-013661756176810.1590/S0100-06832012000600009S0100-06832012000600009The efficiency of different estimation methods of hydro-physical limitsEmma María Martínez0Tomas Serafín Cuesta1Javier José Cancela2Escuela Politécnica SuperiorEscuela Politécnica SuperiorEscuela Politécnica SuperiorThe soil water available to crops is defined by specific values of water potential limits. Underlying the estimation of hydro-physical limits, identified as permanent wilting point (PWP) and field capacity (FC), is the selection of a suitable method based on a multi-criteria analysis that is not always clear and defined. In this kind of analysis, the time required for measurements must be taken into consideration as well as other external measurement factors, e.g., the reliability and suitability of the study area, measurement uncertainty, cost, effort and labour invested. In this paper, the efficiency of different methods for determining hydro-physical limits is evaluated by using indices that allow for the calculation of efficiency in terms of effort and cost. The analysis evaluates both direct determination methods (pressure plate - PP and water activity meter - WAM) and indirect estimation methods (pedotransfer functions - PTFs). The PTFs must be validated for the area of interest before use, but the time and cost associated with this validation are not included in the cost of analysis. Compared to the other methods, the combined use of PP and WAM to determine hydro-physical limits differs significantly in time and cost required and quality of information. For direct methods, increasing sample size significantly reduces cost and time. This paper assesses the effectiveness of combining a general analysis based on efficiency indices and more specific analyses based on the different influencing factors, which were considered separately so as not to mask potential benefits or drawbacks that are not evidenced in efficiency estimation.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000600009&lng=en&tlng=encapacidade de campoponto de murcha permanentefunções de pedotransferênciapsicrômetro WP4 |
| spellingShingle | Emma María Martínez Tomas Serafín Cuesta Javier José Cancela The efficiency of different estimation methods of hydro-physical limits Revista Brasileira de Ciência do Solo capacidade de campo ponto de murcha permanente funções de pedotransferência psicrômetro WP4 |
| title | The efficiency of different estimation methods of hydro-physical limits |
| title_full | The efficiency of different estimation methods of hydro-physical limits |
| title_fullStr | The efficiency of different estimation methods of hydro-physical limits |
| title_full_unstemmed | The efficiency of different estimation methods of hydro-physical limits |
| title_short | The efficiency of different estimation methods of hydro-physical limits |
| title_sort | efficiency of different estimation methods of hydro physical limits |
| topic | capacidade de campo ponto de murcha permanente funções de pedotransferência psicrômetro WP4 |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000600009&lng=en&tlng=en |
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