Modeling of the Fate and Agrochemical Movement Under Controlled Water Table Environment
The study was undertaken to investigate the effect of water table management practices on the environmental transport and fate of agrochemicals. A laboratory based study using disturbed sand soil columns was conducted to investigate the transport and fate of nitrate (NO~), a commonly used agricul...
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2003
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my.upm.eprints.37902013-05-27T07:11:16Z http://psasir.upm.edu.my/id/eprint/3790/ Modeling of the Fate and Agrochemical Movement Under Controlled Water Table Environment M. Almdny, Abdul Hakim S., Salim Mohd Soom, Mohd Amin The study was undertaken to investigate the effect of water table management practices on the environmental transport and fate of agrochemicals. A laboratory based study using disturbed sand soil columns was conducted to investigate the transport and fate of nitrate (NO~), a commonly used agricultural chemical, to the underground environment as effected by controlled water table depths. Three controlled water table depths set as 0.25m, 0.50m, and 0.75m from the surface and free drainage treatment (no controlled water table depth) were used. A simple statistical model based on mUltiple linear regression analysis was developed using experimental data to simulate reduction and transport of nitrate in soil columns under different water table depths. The regression model was developed from selected physical variables including water table depth from the surface, time, and saturated depth. An imperial equation was obtained from the experimental data with a correlation coefficient of R2 =0.83. The performance of this equation was tested using experimental data and it was found that the output from this equation is acceptable and satisfactory.According to the simulated and observed results, it was clearly shown that the water table depth affects the characteristics of transport nitrate. In addition significant reduction in nitrate concentration was achieved through different water table treatments. The results suggest it is possible to promote biological and chemical degradation to reduce nitrate transport by controlling water table depths. Universiti Putra Malaysia Press 2003 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/3790/1/Modeling_of_the_Fate_and_Agrochemical_Movement_Under.pdf M. Almdny, Abdul Hakim and S., Salim and Mohd Soom, Mohd Amin (2003) Modeling of the Fate and Agrochemical Movement Under Controlled Water Table Environment. Pertanika Journal of Science & Technology, 11 (2). pp. 237-247. ISSN 0128-7680 English |
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The study was undertaken to investigate the effect of water table management
practices on the environmental transport and fate of agrochemicals. A laboratory
based study using disturbed sand soil columns was conducted to investigate the
transport and fate of nitrate (NO~), a commonly used agricultural chemical, to
the underground environment as effected by controlled water table depths.
Three controlled water table depths set as 0.25m, 0.50m, and 0.75m from the
surface and free drainage treatment (no controlled water table depth) were
used. A simple statistical model based on mUltiple linear regression analysis was
developed using experimental data to simulate reduction and transport of
nitrate in soil columns under different water table depths. The regression
model was developed from selected physical variables including water table
depth from the surface, time, and saturated depth. An imperial equation was
obtained from the experimental data with a correlation coefficient of R2 =0.83.
The performance of this equation was tested using experimental data and it
was found that the output from this equation is acceptable and satisfactory.According to the simulated and observed results, it was clearly shown that the
water table depth affects the characteristics of transport nitrate. In addition
significant reduction in nitrate concentration was achieved through different
water table treatments. The results suggest it is possible to promote biological
and chemical degradation to reduce nitrate transport by controlling water table
depths. |
format |
Article |
author |
M. Almdny, Abdul Hakim S., Salim Mohd Soom, Mohd Amin |
spellingShingle |
M. Almdny, Abdul Hakim S., Salim Mohd Soom, Mohd Amin Modeling of the Fate and Agrochemical Movement Under Controlled Water Table Environment |
author_facet |
M. Almdny, Abdul Hakim S., Salim Mohd Soom, Mohd Amin |
author_sort |
M. Almdny, Abdul Hakim |
title |
Modeling of the Fate and Agrochemical Movement Under Controlled Water Table Environment |
title_short |
Modeling of the Fate and Agrochemical Movement Under Controlled Water Table Environment |
title_full |
Modeling of the Fate and Agrochemical Movement Under Controlled Water Table Environment |
title_fullStr |
Modeling of the Fate and Agrochemical Movement Under Controlled Water Table Environment |
title_full_unstemmed |
Modeling of the Fate and Agrochemical Movement Under Controlled Water Table Environment |
title_sort |
modeling of the fate and agrochemical movement under controlled water table environment |
publisher |
Universiti Putra Malaysia Press |
publishDate |
2003 |
url |
http://psasir.upm.edu.my/id/eprint/3790/1/Modeling_of_the_Fate_and_Agrochemical_Movement_Under.pdf http://psasir.upm.edu.my/id/eprint/3790/ |
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