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Dive into the research topics where Susana A. Suárez is active.

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Featured researches published by Susana A. Suárez.


Agriculture, Ecosystems & Environment | 2002

Woody species invasion in the Rolling Pampa grasslands, Argentina.

Claudio M. Ghersa; Elba B. de la Fuente; Susana A. Suárez; Rolando J.C. León

Information on the geographical distribution of plant invasion has been recorded in detail in some areas of the world; however, in large regions such as South America there are a few, if any, records of the spread of alien plants and invasive species and even less information about their effects on ecosystems at different levels of organization. This study examines the extent to which woody species introduced during the last centuries are invading the Rolling Pampa (which is typical of the entire region of the Argentina pampas) and discusses whether this invasion is related to the species’ genetics or to environmental factors. All woody species were surveyed along landscape corridors (highways and intersecting secondary dirt roads and streams), as well as in farmed fields under three different tillage systems: zero tillage in the entire field for all crops in the rotation (where tillage was replaced by a presowing herbicide application), zero tillage for selected crops, and conventional tillage. Landscape corridors along the roads had been invaded by 40 woody species (mostly trees). On the farmed land, fields under the zero tillage farming system were invaded by seven woody species (three tree species and four shrubs). With zero tillage for select crops only, woody species richness was reduced to three (one tree and two shrub species). In the conventional tillage, there were only three invading species, all shrubs. In both the roadside and riparian corridors, the species with the highest constancy values were Gleditsia triacanthos L., Morus alba L., and Melia azedarach L. In both types of zero tillage farmed fields, M. alba was absent, but G. triacanthos and M. azedarach remained the species with the highest constancy values. Both genetic and ecological factors were important determinants for the invasion of the pampas by woody species. The woody invasion process has reached a point at which the pampean grasslands on the better-drained soils will no longer be restored to a grassland biome without human intervention.


Agriculture, Ecosystems & Environment | 2003

Response of winter crops differing in grain yield and essential oil production to some agronomic practices and environmental gradient in the Rolling Pampa, Argentina

Elba B. de la Fuente; Alejandra Gil; Adriana E. Lenardis; Mónica López Pereira; Susana A. Suárez; Claudio M. Ghersa; Margarita Yaber Grass

Abstract Intensive land use in the Rolling Pampa of Argentina generates heterogeneous environmental and ecological conditions associated with agronomic practices. The yields of crops with different resource allocation to the production of primary or secondary metabolites could vary with the environment. Crops that mainly produce primary metabolites would have high yields under favorable environments, and crops that produce high quantities of secondary metabolites would have high essential oil yield under unfavorable environments. To test whether this hypothesis is applicable under the Rolling Pampa conditions, field experiments were conducted with the following objectives: (1) to compare biomass and grain yield in three winter crops: wheat (Triticum aestivum L.), coriander (Coriandrum sativum L.) landrace with high essential oil content (HEO) and coriander landrace with low essential oil content (LEO), grown at different levels of N fertilization and weed control; and (2) to determine relative changes in grain yield, essential oil production and harvest index with environment in the coriander landraces. The crops were grown at two locations differing in physical and chemical soil degradation due to the intensity of land use. Wheat allocated resources mainly to the production of primary metabolites, producing higher biomass and grain yield in the favorable environments. The HEO coriander landrace, which allocates resources to the production of both primary and secondary metabolites, produced similar biomass and grain yield in both locations, but resource partitioning to the production of essential oils was high under unfavorable environmental conditions. The LEO coriander landrace which allocates resources mainly to the production of primary metabolites and, in a minor proportion, to secondary metabolites, produced high biomass and grain yield in intermediate environments and high essential oil yield under unfavorable environments. The environmental conditions of the Rolling Pampa that curtailed the allocation of resources to the production of grain yield promoted the production of essential oils. Based on these results, under poor soil environments, one option is to produce crops with essential oils as marketable yields, instead of adding inputs to improve soil condition and produce traditional crops, where yield is very sensitive to environmental variations.


Journal of Agricultural and Food Chemistry | 2002

Coriander Essential Oil Composition from Two Genotypes Grown in Different Environmental Conditions

Alejandra Gil; Elba B. de la Fuente; Adriana E. Lenardis; Mónica López Pereira; Susana A. Suárez; Arnaldo L. Bandoni; Catalina M. van Baren; Paola Di Leo Lira; Claudio M. Ghersa


Agronomy Journal | 2001

Weed community as an indicator of summer crop yield and site quality

Susana A. Suárez; Elba B. de la Fuente; Claudio M. Ghersa; Rolando J.C. León


Industrial Crops and Products | 2012

Marcela, a promising medicinal and aromatic plant from Latin America: A review

Daiana Retta; Eduardo Dellacassa; José Villamil; Susana A. Suárez; Arnaldo L. Bandoni


Agronomy Journal | 1999

Soybean Weed Communities: Relationships with Cultural History and Crop Yield

Elba B. de la Fuente; Susana A. Suárez; Claudio M. Ghersa; Rolando J.C. León


Agronomy Journal | 2003

Weed and Insect Communities in Wheat Crops with Different Management Practices

Elba B. de la Fuente; Susana A. Suárez; Claudio M. Ghersa


Njas-wageningen Journal of Life Sciences | 2014

Intercropping sunflower and soybean in intensive farming systems: evaluating yield advantage and effect on weed and insect assemblages

Elba B. de la Fuente; Susana A. Suárez; Adriana E. Lenardis; Santiago L. Poggio


European Journal of Agronomy | 2006

Insect communities related to wheat and coriander cropping histories and essential oils in the Rolling Pampa, Argentina

Elba B. de la Fuente; Adriana E. Lenardis; Susana A. Suárez; Alejandra Gil; Claudio M. Ghersa


Ecología austral | 2008

Problemas ambientales asociados a la actividad humana: la agricultura

Elba B. de la Fuente; Susana A. Suárez

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Claudio M. Ghersa

University of Buenos Aires

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Alejandra Gil

University of Buenos Aires

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A C Guglielmini

University of Buenos Aires

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B C Kruk

University of Buenos Aires

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