Groundwater dynamics and quality under intensive cropping systems
A study was conducted from October 1994 to March 1996 to assess groundwater dynamics and quality in relation to landuse and farm input of nitrogen fertilizer in a highly diversified and intensive agricultural area at Magnuang, Batac, Ilocos Norte. Monthly groundwater depths, nitrate-nitrogen (NO3-N)...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Cambridge University Press
1999
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/167155 |
| _version_ | 1855539050587357184 |
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| author | Gumtang, R.J. Pampolino, M.F. Tuong, T.P. Bucao, D. |
| author_browse | Bucao, D. Gumtang, R.J. Pampolino, M.F. Tuong, T.P. |
| author_facet | Gumtang, R.J. Pampolino, M.F. Tuong, T.P. Bucao, D. |
| author_sort | Gumtang, R.J. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | A study was conducted from October 1994 to March 1996 to assess groundwater dynamics and quality in relation to landuse and farm input of nitrogen fertilizer in a highly diversified and intensive agricultural area at Magnuang, Batac, Ilocos Norte. Monthly groundwater depths, nitrate-nitrogen (NO3-N), chloride (Cl−), bicarbonate (HCO3−), electrical conductivity (EC) and pH were determined in 19 agricultural and domestic wells. In the dry season, sweet pepper (Capsicum annuum) had a higher irrigation requirement and caused more groundwater level decline than other crops. EC (700–3000 μmho cm−1) and HCO3− (90–500 ppm) in all wells exceeded the FAO threshold quality for irrigation but were not related to farm management practices. Eight wells showed near or above the World Health Organization NO3-N limit (10 ppm) for drinking water. High nitrogen fertilizer input increased the mean NO3-N (r2 = 0.45, p < 0.002). The percentage of the wells' service area under rice cultivation in the wet season accounted for 84% (p < 0.001) of the variation in NO3-N among the wells. The mean NO3-N declined as the percentage of service area under rice increased. This was related to the denitrification process in the flooded fields and the lower levels of nitrogen fertilizer for rice compared with other crops. |
| format | Journal Article |
| id | CGSpace167155 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1999 |
| publishDateRange | 1999 |
| publishDateSort | 1999 |
| publisher | Cambridge University Press |
| publisherStr | Cambridge University Press |
| record_format | dspace |
| spelling | CGSpace1671552026-01-05T13:39:57Z Groundwater dynamics and quality under intensive cropping systems Gumtang, R.J. Pampolino, M.F. Tuong, T.P. Bucao, D. irrigation groundwater level water quality seasonability land use farm inputs cropping systems A study was conducted from October 1994 to March 1996 to assess groundwater dynamics and quality in relation to landuse and farm input of nitrogen fertilizer in a highly diversified and intensive agricultural area at Magnuang, Batac, Ilocos Norte. Monthly groundwater depths, nitrate-nitrogen (NO3-N), chloride (Cl−), bicarbonate (HCO3−), electrical conductivity (EC) and pH were determined in 19 agricultural and domestic wells. In the dry season, sweet pepper (Capsicum annuum) had a higher irrigation requirement and caused more groundwater level decline than other crops. EC (700–3000 μmho cm−1) and HCO3− (90–500 ppm) in all wells exceeded the FAO threshold quality for irrigation but were not related to farm management practices. Eight wells showed near or above the World Health Organization NO3-N limit (10 ppm) for drinking water. High nitrogen fertilizer input increased the mean NO3-N (r2 = 0.45, p < 0.002). The percentage of the wells' service area under rice cultivation in the wet season accounted for 84% (p < 0.001) of the variation in NO3-N among the wells. The mean NO3-N declined as the percentage of service area under rice increased. This was related to the denitrification process in the flooded fields and the lower levels of nitrogen fertilizer for rice compared with other crops. 1999-04 2024-12-19T12:57:03Z 2024-12-19T12:57:03Z Journal Article https://hdl.handle.net/10568/167155 en Cambridge University Press GUMTANG, R. J.; PAMPOLINO, M. F.; TUONG, T. P. and BUCAO, D. 1999. Groundwater dynamics and quality under intensive cropping systems. Ex. Agric., Volume 35 no. 2 p. 153-166 |
| spellingShingle | irrigation groundwater level water quality seasonability land use farm inputs cropping systems Gumtang, R.J. Pampolino, M.F. Tuong, T.P. Bucao, D. Groundwater dynamics and quality under intensive cropping systems |
| title | Groundwater dynamics and quality under intensive cropping systems |
| title_full | Groundwater dynamics and quality under intensive cropping systems |
| title_fullStr | Groundwater dynamics and quality under intensive cropping systems |
| title_full_unstemmed | Groundwater dynamics and quality under intensive cropping systems |
| title_short | Groundwater dynamics and quality under intensive cropping systems |
| title_sort | groundwater dynamics and quality under intensive cropping systems |
| topic | irrigation groundwater level water quality seasonability land use farm inputs cropping systems |
| url | https://hdl.handle.net/10568/167155 |
| work_keys_str_mv | AT gumtangrj groundwaterdynamicsandqualityunderintensivecroppingsystems AT pampolinomf groundwaterdynamicsandqualityunderintensivecroppingsystems AT tuongtp groundwaterdynamicsandqualityunderintensivecroppingsystems AT bucaod groundwaterdynamicsandqualityunderintensivecroppingsystems |