Assessment of methods to determine soil characteristics for management and design of irrigation systems

Irrigation system design and irrigation management require appropriate classification of the soil and type of crop match. In Chile, agrological reports are currently being used to determine the homogeneity of soil units and land capability classes: fruit tree production vs orchard design. Agrologica...

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Autores principales:	Valdivia-Cea,Walter, Holzapfel,Eduardo, Rivera,Diego, Paredes,Jerónimo
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2017
Materias:	Soil hydrophysical properties pedotransfer functions management of irrigation systems
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162017000300014
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spelling	oai:scielo:S0718-951620170003000142017-10-13Assessment of methods to determine soil characteristics for management and design of irrigation systemsValdivia-Cea,WalterHolzapfel,EduardoRivera,DiegoParedes,Jerónimo Soil hydrophysical properties pedotransfer functions management of irrigation systems Irrigation system design and irrigation management require appropriate classification of the soil and type of crop match. In Chile, agrological reports are currently being used to determine the homogeneity of soil units and land capability classes: fruit tree production vs orchard design. Agrological studies use a number of soil characteristics, but these do not include hydrophysical properties, which are essential when zoning for irrigation. Therefore, it is necessary to establish a methodology to objectively evaluate soils, based on a quantitative analysis that includes hydrophysical parameters. In this study, different methodologies are proposed for classifying homogenous soil units based on extensive field sampling. The field data was evaluated using two methodologies: 1) the SAG-USDA Manual and 2) in situ sampling of soil’s hydrophysical properties and pedotransfer models. There were differences between the methodologies regarding the zoning soil properties for irrigation system design and management. The methodology based on the SAG-USDA Manual requires auxiliary data in order to provide useful maps for design and management of irrigation systems. Published pedotransfer functions should be carefully assess before their use in large-scale design, as the quality the estimations depends on the data used to derive the equations. Therefore, if field data is available, we recommend calibrating equations using well-known statistical methods such as least square. In this study, the functions obtained describe the properties of interest properly, such as the field capacity for design of micro-irrigation systems. However, predicting wilting point did not give reliable results.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.17 n.3 20172017-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162017000300014en10.4067/S0718-95162017000300014
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Soil hydrophysical properties pedotransfer functions management of irrigation systems
spellingShingle	Soil hydrophysical properties pedotransfer functions management of irrigation systems Valdivia-Cea,Walter Holzapfel,Eduardo Rivera,Diego Paredes,Jerónimo Assessment of methods to determine soil characteristics for management and design of irrigation systems
description	Irrigation system design and irrigation management require appropriate classification of the soil and type of crop match. In Chile, agrological reports are currently being used to determine the homogeneity of soil units and land capability classes: fruit tree production vs orchard design. Agrological studies use a number of soil characteristics, but these do not include hydrophysical properties, which are essential when zoning for irrigation. Therefore, it is necessary to establish a methodology to objectively evaluate soils, based on a quantitative analysis that includes hydrophysical parameters. In this study, different methodologies are proposed for classifying homogenous soil units based on extensive field sampling. The field data was evaluated using two methodologies: 1) the SAG-USDA Manual and 2) in situ sampling of soil’s hydrophysical properties and pedotransfer models. There were differences between the methodologies regarding the zoning soil properties for irrigation system design and management. The methodology based on the SAG-USDA Manual requires auxiliary data in order to provide useful maps for design and management of irrigation systems. Published pedotransfer functions should be carefully assess before their use in large-scale design, as the quality the estimations depends on the data used to derive the equations. Therefore, if field data is available, we recommend calibrating equations using well-known statistical methods such as least square. In this study, the functions obtained describe the properties of interest properly, such as the field capacity for design of micro-irrigation systems. However, predicting wilting point did not give reliable results.
author	Valdivia-Cea,Walter Holzapfel,Eduardo Rivera,Diego Paredes,Jerónimo
author_facet	Valdivia-Cea,Walter Holzapfel,Eduardo Rivera,Diego Paredes,Jerónimo
author_sort	Valdivia-Cea,Walter
title	Assessment of methods to determine soil characteristics for management and design of irrigation systems
title_short	Assessment of methods to determine soil characteristics for management and design of irrigation systems
title_full	Assessment of methods to determine soil characteristics for management and design of irrigation systems
title_fullStr	Assessment of methods to determine soil characteristics for management and design of irrigation systems
title_full_unstemmed	Assessment of methods to determine soil characteristics for management and design of irrigation systems
title_sort	assessment of methods to determine soil characteristics for management and design of irrigation systems
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162017000300014
work_keys_str_mv	AT valdiviaceawalter assessmentofmethodstodeterminesoilcharacteristicsformanagementanddesignofirrigationsystems AT holzapfeleduardo assessmentofmethodstodeterminesoilcharacteristicsformanagementanddesignofirrigationsystems AT riveradiego assessmentofmethodstodeterminesoilcharacteristicsformanagementanddesignofirrigationsystems AT paredesjeronimo assessmentofmethodstodeterminesoilcharacteristicsformanagementanddesignofirrigationsystems
_version_	1714206552999591936

Assessment of methods to determine soil characteristics for management and design of irrigation systems

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