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The authors wish to thank the Comision Interministerial de Ciencia y Tecnologia (CICYT) of the Spanish Ministry of Education and Science for the financial support given along 20 years of study (Grants No: PR84-0495; AGR90-0088; AGF96-1138-C02-01; AGL2001-3822-C02-01; AGL2002-04186-C03-01; and AGL200765698-C03-01). Thanks should be given to IMIDRA for their support during these last 30 years of field experimentation at El Encin experimental Station.
Análisis de autorías institucional
Hernanz, J. L.Autor (correspondencia)Sanchez-Giron, V.Autor o CoautorSoil carbon sequestration and stratification in a cereal/leguminous crop rotation with three tillage systems in semiarid conditions
Publicado en:Agriculture Ecosystems & Environment. 133 (1-2): 114-122 - 2009-01-01 133(1-2), DOI: 10.1016/j.agee.2009.05.009
Autores: Hernanz, J. L.; Sanchez-Giron, V.; Navarrete, L.;
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Resumen
The stratification of soil organic matter at different depths is common under conservation tillage and especially under no-tillage. The degree of stratification, or stratification ratio (SR), can be used as an indicator of soil quality because surface organic matter is essential to erosion control, water infiltration, and the conservation of nutrients. In the semiarid regions of the Mediterranean which are devoted to rain-fed crop production, soil has low organic carbon content because of the high mineralization rates of soil organic matter and the lack of crop residue after periods of drought. Twenty-year effects (19852006) of tillage systems on soil organic carbon (SOC) stratification were studied in a Vertic Luvisol with a loam texture. SOC was expressed in carbon concentration (Cc) and in equivalent soil mass (esm). The tillage treatments used were conventional tillage (CT), minimum tillage (MT), and no-tillage (NT). These treatments were under winter wheat (Triticum aestivum L.), vetch (Vicia sativa L.) and pea (Pisum sativum L) rotation (W-VP). Similarly, several stratification ratios (SRs) were assessed as indicators of SOC's time evolution. Before the start of the experiment the crop rotation was cereal-fallow (C-F). In each treatment and replication four soil layers of the same thickness (10 cm) were sampled to obtain soil bulk density (BD) and Cc. After 20 years the study revealed that the adoption of a W-VP rotation was at least as important as the shift from CT to NT in the increase of stocked SOC in the soil profile. This last treatment was the tillage system with the highest SOC, whereas no significant differences were encountered between MT and CT. The average SOC was 14% higher in NT than in MT and CT. This trend has been systematically observed practically since 1996 to the present in all treatments. The steady state of SOC sequestration was reached after 11 years of starting the experiment in NT and 12 years in CT and MT. SOC, expressed as Cc and esm, showed the highest stratification in NT, second highest in MT and lowest in CT. In NT, stocked SOC increased from 1996 to 2005 in the top layer but it declined systematically in the bottom layer. (C) 2009 Elsevier B.V. All rights reserved.
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Impacto bibliométrico. Análisis de la aportación y canal de difusión
El trabajo ha sido publicado en la revista Agriculture Ecosystems & Environment debido a la progresión y el buen impacto que ha alcanzado en los últimos años, según la agencia WoS (JCR), se ha convertido en una referencia en su campo. En el año de publicación del trabajo, 2009, se encontraba en la posición 1/44, consiguiendo con ello situarse como revista Q1 (Primer Cuartil), en la categoría Agriculture, Multidisciplinary.
Desde una perspectiva relativa, y atendiendo al indicador del impacto normalizado calculado a partir del Field Citation Ratio (FCR) de la fuente Dimensions, arroja un valor de: 16.2, lo que indica que, de manera comparada con trabajos en la misma disciplina y en el mismo año de publicación, lo ubica como trabajo citado por encima de la media. (fuente consultada: Dimensions Jul 2025)
De manera concreta y atendiendo a las diferentes agencias de indexación, el trabajo ha acumulado, hasta la fecha 2025-07-11, el siguiente número de citas:
- WoS: 108
- Scopus: 137
Impacto y visibilidad social
Análisis de liderazgo de los autores institucionales
Existe un liderazgo significativo ya que algunos de los autores pertenecientes a la institución aparecen como primer o último firmante, se puede apreciar en el detalle: Primer Autor (HERNANZ MARTOS, JOSE LUIS) .
el autor responsable de establecer las labores de correspondencia ha sido HERNANZ MARTOS, JOSE LUIS.