Assesing the vertical movement of a nematicide in a sandy loam soil and its correspondence using a numerical model (HYDRUS 1D)

A test under laboratory conditions was performed to typify and model the vertical movement of a nematicide (DiTera) applied at concentrations of 400, 700, and 1000 mg L-1 via drip irrigation to a sandy loam class soil confined in tanks of 1 m³. Vacuum extractometers were set up in the tank at differ...

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Autores principales:	Márquez,D., Faúndez,C., Aballay,E., Haberland,J., Kremer,C.
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2017
Materias:	Pesticide transport HYDRUS 1D DiTera Advection-Dispersion Equation Numeric Model Vadose Zone Flux
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162017000100014
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spelling	oai:scielo:S0718-951620170001000142017-09-27Assesing the vertical movement of a nematicide in a sandy loam soil and its correspondence using a numerical model (HYDRUS 1D)Márquez,D.Faúndez,C.Aballay,E.Haberland,J.Kremer,C. Pesticide transport HYDRUS 1D DiTera Advection-Dispersion Equation Numeric Model Vadose Zone Flux A test under laboratory conditions was performed to typify and model the vertical movement of a nematicide (DiTera) applied at concentrations of 400, 700, and 1000 mg L-1 via drip irrigation to a sandy loam class soil confined in tanks of 1 m³. Vacuum extractometers were set up in the tank at different depths to obtain samples of soil solution starting 10 cm away from the drip emitter. HPLC was used to measure the nematicide concentration in the soil solution. Later HYDRUS 1D was used to model the vertical nematicide concentration considering homogeneous soil. Soil hydraulic parameters were obtained from laboratory experiments whereas the dispersion length was obtained by inverse estimation matching measured and modeled data. Laboratory results showed no significant differences in vertical nematicide (distribution considered a fraction of the initial concentration), having a higher concentration at the surface and decreasing gradually with the depth. The predictive model was able to describe te nematicide behavior of the nematicide according to controlled test, obtaining a R² of 0.97, a RMSE of 67.41 mg L-1, a RRMSE of 13.33% and a Nash of 0.92. These results confirm the proposed model; however, further studies on this issue are needed, considering different scenarios in laboratory conditions and thus scaling it up to field conditions.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.1 20172017-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162017000100014en10.4067/S0718-95162017005000013
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Pesticide transport HYDRUS 1D DiTera Advection-Dispersion Equation Numeric Model Vadose Zone Flux
spellingShingle	Pesticide transport HYDRUS 1D DiTera Advection-Dispersion Equation Numeric Model Vadose Zone Flux Márquez,D. Faúndez,C. Aballay,E. Haberland,J. Kremer,C. Assesing the vertical movement of a nematicide in a sandy loam soil and its correspondence using a numerical model (HYDRUS 1D)
description	A test under laboratory conditions was performed to typify and model the vertical movement of a nematicide (DiTera) applied at concentrations of 400, 700, and 1000 mg L-1 via drip irrigation to a sandy loam class soil confined in tanks of 1 m³. Vacuum extractometers were set up in the tank at different depths to obtain samples of soil solution starting 10 cm away from the drip emitter. HPLC was used to measure the nematicide concentration in the soil solution. Later HYDRUS 1D was used to model the vertical nematicide concentration considering homogeneous soil. Soil hydraulic parameters were obtained from laboratory experiments whereas the dispersion length was obtained by inverse estimation matching measured and modeled data. Laboratory results showed no significant differences in vertical nematicide (distribution considered a fraction of the initial concentration), having a higher concentration at the surface and decreasing gradually with the depth. The predictive model was able to describe te nematicide behavior of the nematicide according to controlled test, obtaining a R² of 0.97, a RMSE of 67.41 mg L-1, a RRMSE of 13.33% and a Nash of 0.92. These results confirm the proposed model; however, further studies on this issue are needed, considering different scenarios in laboratory conditions and thus scaling it up to field conditions.
author	Márquez,D. Faúndez,C. Aballay,E. Haberland,J. Kremer,C.
author_facet	Márquez,D. Faúndez,C. Aballay,E. Haberland,J. Kremer,C.
author_sort	Márquez,D.
title	Assesing the vertical movement of a nematicide in a sandy loam soil and its correspondence using a numerical model (HYDRUS 1D)
title_short	Assesing the vertical movement of a nematicide in a sandy loam soil and its correspondence using a numerical model (HYDRUS 1D)
title_full	Assesing the vertical movement of a nematicide in a sandy loam soil and its correspondence using a numerical model (HYDRUS 1D)
title_fullStr	Assesing the vertical movement of a nematicide in a sandy loam soil and its correspondence using a numerical model (HYDRUS 1D)
title_full_unstemmed	Assesing the vertical movement of a nematicide in a sandy loam soil and its correspondence using a numerical model (HYDRUS 1D)
title_sort	assesing the vertical movement of a nematicide in a sandy loam soil and its correspondence using a numerical model (hydrus 1d)
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=S0718-95162017000100014
work_keys_str_mv	AT marquezd assesingtheverticalmovementofanematicideinasandyloamsoilanditscorrespondenceusinganumericalmodelhydrus1d AT faundezc assesingtheverticalmovementofanematicideinasandyloamsoilanditscorrespondenceusinganumericalmodelhydrus1d AT aballaye assesingtheverticalmovementofanematicideinasandyloamsoilanditscorrespondenceusinganumericalmodelhydrus1d AT haberlandj assesingtheverticalmovementofanematicideinasandyloamsoilanditscorrespondenceusinganumericalmodelhydrus1d AT kremerc assesingtheverticalmovementofanematicideinasandyloamsoilanditscorrespondenceusinganumericalmodelhydrus1d
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Assesing the vertical movement of a nematicide in a sandy loam soil and its correspondence using a numerical model (HYDRUS 1D)

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