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dc.contributor.author
Nosetto, Marcelo Daniel  
dc.contributor.author
Jobbagy Gampel, Esteban Gabriel  
dc.contributor.author
Jackson, R. B.  
dc.contributor.author
Sznaider, G. A.  
dc.date.available
2024-05-17T13:05:48Z  
dc.date.issued
2009-12  
dc.identifier.citation
Nosetto, Marcelo Daniel; Jobbagy Gampel, Esteban Gabriel; Jackson, R. B.; Sznaider, G. A.; Reciprocal influence of crops and shallow ground water in sandy landscapes of the Inland Pampas; Elsevier Science; Field Crops Research; 113; 12-2009; 138-148  
dc.identifier.issn
0378-4290  
dc.identifier.uri
http://hdl.handle.net/11336/235624  
dc.description.abstract
In regions with shallow water tables, ground water may have a positive (water supply) or negative (waterlogging or salinization) impact on crops. Reciprocally, crops can influence ground water, altering water table depth and chemical composition. We quantified these reciprocal influences along natural gradients of groundwater depth in flat sedimentary landscapes of the Inland Pampas occupied by wheat, soybean, and maize during two growing seasons (2006/2007 and 2007/2008). We correlated crop yield and groundwater depth maps at the field level and made direct plant, soil and groundwater observations at the stand level across topographic gradients. Water table level largely accounted for spatial crop yield variation, explaining 20–75% of their variance. An optimum groundwater depth range, where crop yields were highest, was observed for all three crop species analyzed (1.40–2.45 m for maize, 1.20–2.20 m for soybean, and 0.70–1.65 m for wheat). The areas within these optimum bands had yields that were 3.7, 3 and 1.8 times larger than those where the water table was below 4 m for wheat, maize, and soybean, respectively. As groundwater levels become shallower than these depth bands, crop yields declined sharply (∼0.05 kg m−2 on average for every 10 cm increase in water table level), suggesting negative effects of waterlogging, root anoxia and/or salinity. Groundwater levels below these depth bands were associated with gradually declining yields, likely driven by poorer groundwater supply. Crops influenced groundwater levels through their control of recharge and discharge fluxes. The presence of active crops prevented recharge events (sharp water table level rises) observed during rainy periods in fall and spring. Crops consumed ground water generating increasing discharge as the water table depth decreased. This consumption led to rising soil and groundwater salinization towards shallower water table positions as the growing season progressed. The electrical conductivity of ground water for maize at maturity doubled the pre-sowing values (∼2.2 dS m−1 vs. ∼1.1 dS m−1, p < 0.01,) when ground water was above 2-m depth, whereas negligible changes were observed when groundwater depth exceeded 3.5 m. In flat humid landscapes, such as the Inland Pampas, crops and shallow ground water may be closely connected and influence each other through different mechanisms, posing both opportunities and risks for agricultural systems. Understanding these complex interactions could help raise and stabilize yields and provide keys to regulate the labile hydrology of these plains.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier Science  
dc.rights
info:eu-repo/semantics/restrictedAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
WATERLOGGING  
dc.subject
SALINIZATION  
dc.subject
ECOHYDROLOGY  
dc.subject
MAIZE  
dc.subject
SOYBEAN  
dc.subject
WHEAT  
dc.subject.classification
Ciencias del Suelo  
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Agricultura, Silvicultura y Pesca  
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CIENCIAS AGRÍCOLAS  
dc.title
Reciprocal influence of crops and shallow ground water in sandy landscapes of the Inland Pampas  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2024-05-03T13:59:21Z  
dc.journal.volume
113  
dc.journal.pagination
138-148  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: Nosetto, Marcelo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi". Universidad Nacional de San Luis. Facultad de Ciencias Físico, Matemáticas y Naturales. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi"; Argentina  
dc.description.fil
Fil: Jobbagy Gampel, Esteban Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi". Universidad Nacional de San Luis. Facultad de Ciencias Físico, Matemáticas y Naturales. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi"; Argentina  
dc.description.fil
Fil: Jackson, R. B.. University of Duke; Estados Unidos  
dc.description.fil
Fil: Sznaider, G. A.. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Métodos Cuantitativos y Sistemas de Información; Argentina  
dc.journal.title
Field Crops Research  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.fcr.2009.04.016  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0378429009001075?via%3Dihub