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dc.contributorCetin, Mahmuten_US
dc.contributorKarnez, Ebruen_US
dc.contributorKirda, Cevaten_US
dc.contributorTopcu, Sevilayen_US
dc.contributorRyan, Johnen_US
dc.contributorOztekin, Erenen_US
dc.contributorDingil, Mahmuten_US
dc.contributorKorkmaz, Kursaten_US
dc.contributorOguz, H.en_US
dc.creatorIbrikci, Hayriyeen_US
dc.identifier.citationHayriye Ibrikci, Mahmut Cetin, Ebru Karnez, Cevat Kirda, Sevilay Topcu, John Ryan, Eren Oztekin, Mahmut Dingil, Kursat Korkmaz, H. Oguz. (30/1/2012). Spatial and Temporal Variability of Groundwater Nitrate Concentrations in Irrigated Mediterranean Agriculture. Communications in Soil Science and Plant Analysis, 43 (1-2), pp. 47-59.en_US
dc.description.abstractAs nitrogen (N) fertilizer-use efficiency rarely exceeds 50% in most agricultural systems, the potential leaching of N to the groundwater, particularly under irrigated conditions, has economic, health, and environmental implications. Research in the Akarsu irrigation district in the Lower Seyhan Plain in southern Turkey sought to determine spatial and temporal variability of groundwater (GW) nitrate (NO3) concentrations in 2007-2008. Shallow groundwater observation wells 3 m deep were installed at different locations to represent the whole irrigation district. Groundwater samples were collected (February, April, July, October) and analyzed for ammonium (NH4) and NO3 concentrations. Because NH4 values were negligible, only NO3 data were processed to determine spatial and temporal variability and then used to develop regional NO3 maps using geographic information systems. Groundwater NO3 concentrations ranged between 0.17 and 55.96 mg L-1 during the 2 years, only exceeding the critical 50 mg L-1 concentration in 1% of the area sampled. The areal mean of NO3 concentration was greatest in February, indicating a potential N leaching of unused N from the early season with intensive rainfall, especially in wheat-growing areas. Groundwater NO3 concentrations decreased after February; however, during the peak irrigation season in July, NO3 was relatively low because of crop uptake during spring and summer. In about half the area, groundwater NO3 concentrations ranged between 20 and 50 mg L-1 and were thus marginal relative to the critical pollution level. As N fertilizer use will continue to increase, especially with the expanded irrigation that is now occurring in the Mediterranean region, regular monitoring of groundwater NO3 is advisable under such conditions.en_US
dc.publisherTaylor and Francisen_US
dc.sourceCommunications in Soil Science and Plant Analysis;43,(2012) Pagination 47-59en_US
dc.subjectdrainage observation wellsen_US
dc.subjectgroundwater nitrateen_US
dc.subjectpotential nitrate pollutionen_US
dc.titleSpatial and Temporal Variability of Groundwater Nitrate Concentrations in Irrigated Mediterranean Agricultureen_US
dc.typeJournal Articleen_US
cg.subject.agrovocirrigation schemesen_US
cg.subject.agrovocmediterranean regionen_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.centerCukurova University - CU Turkeyen_US
cg.contributor.centerUniversity of Ordu, Faculty of Agriculture - ODU - FoAen_US
cg.contributor.centerCankiri Karatekin University - Karatekinen_US
cg.contributor.funderCukurova University - CU Turkeyen_US
cg.contributor.funderEuropean Union - EU Belgiumen_US
cg.contributor.projectCommunication and Documentation Information Services (CODIS)en_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.coverage.regionWestern Asiaen_US
cg.isijournalISI Journalen_US
dc.identifier.statusTimeless limited accessen_US
cg.journalCommunications in Soil Science and Plant Analysisen_US

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