Soil dry aggregate stability and wind erodible fraction in a semiarid environment of Argentina

Colazo, Juan Cruz; Buschiazzo, Daniel Eduardo

doi:10.1016/j.geoderma.2010.07.016

Cited by 134 publications

(60 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The SOC can promote macroaggregation and increase the aggregate stability through biological and physicochemical bonding mechanisms (Tisdall and Oades, 1982;Colazo and Buschiazzo, 2010). Our results cannot be directly compared with other studies as there is limited information on CC effects on soil properties in the central Great Plains under no-till conditions.…”

Section: Cover Cropmentioning

confidence: 79%

Replacing Fallow with Cover Crops in a Semiarid Soil: Effects on Soil Properties

Blanco‐Canqui

Holman

Schlegel

et al. 2013

Soil Science Soc of Amer J

200

147

View full text Add to dashboard Cite

Replacement of fallow in crop–fallow systems with cover crops (CCs) may improve soil properties. We assessed whether replacing fallow in no‐till winter wheat (Triticum aestivum L.)–fallow with winter and spring CCs for 5 yr reduced wind and water erosion, increased soil organic carbon (SOC), and improved soil physical properties on a Ulysses silt loam (fine‐silty, mixed, superactive, mesic Aridic Haplustolls) in the semiarid central Great Plains. Winter triticale (×Triticosecale Wittm.), winter lentil (Lens culinaris Medik.), spring lentil, spring pea (Pisum sativum L. ssp.), and spring triticale CCs were compared with wheat–fallow and continuous wheat under no‐till management. We also studied the effect of triticale haying on soil properties. Results indicate that spring triticale and spring lentil increased soil aggregate size distribution, while spring lentil reduced the wind erodible fraction by 1.6 times, indicating that CCs reduced the soil's susceptibility to wind erosion. Cover crops also increased wet aggregate stability and reduced runoff loss of sediment, total P, and NO3–N. After 5 yr, winter and spring triticale increased SOC pool by 2.8 Mg ha–1 and spring lentil increased SOC pool by 2.4 Mg ha–1 in the 0‐ to 7.5‐cm depth compared with fallow. Triticale haying compared with no haying for 5 yr did not affect soil properties. Nine months after termination, CCs had, however, no effects on soil properties, suggesting that CC benefits are short lived in this climate. Overall, CCs, grown in each fallow phase in no‐till, can reduce soil erosion and improve soil aggregation in this semiarid climate.

show abstract

Section: Cover Cropmentioning

confidence: 79%

Replacing Fallow with Cover Crops in a Semiarid Soil: Effects on Soil Properties

Blanco‐Canqui

Holman

Schlegel

et al. 2013

Soil Science Soc of Amer J

200

147

View full text Add to dashboard Cite

show abstract

“…As noted earlier, this would suggest that better soils also have higher resistance against land degradation, albeit that other unobserved effects might be at play as well. The reason that productive soils are more resistant against degradation processes like water (Stanchi et al, 2015) and wind erosion (Herrick and Beh, 2015) is closely related to prevailing aggregate stability (Colazo and Buschiazzo, 2010) that determines important soil production properties like infiltration and permeability while protecting soils against dispersive water and wind forces (Jozefaciuk and Czachor, 2014;Geng et al, 2015). Organic matter that acts as a binding agent and nucleus in the formation of aggregates is the most important component of soil aggregate stability.…”

Section: Resultsmentioning

confidence: 99%

Quantifying the impact of land degradation on crop production: the case of Senegal

2016

View full text Add to dashboard Cite

Abstract. Land degradation has been a persistent problem in Senegal for more than a century and by now has become a serious impediment to long-term development. In this paper, we quantify the impact of land degradation on crop yields using the results of a nationwide land degradation assessment. For this, the study needs to address two issues. First, the land degradation assessment comprises qualitative expert judgements that have to be converted into more objective, quantitative terms. We propose a land degradation index and assess its plausibility. Second, observational data on soils, land use, and rainfall do not provide sufficient information to isolate the impact of land degradation. We, therefore, design a pseudo-experiment that for sites with otherwise similar circumstances compares the yield of a site with and one without land degradation. This pairing exercise is conducted under a gradual refining of the classification of circumstances, until a more or less stable response to land degradation is obtained. In this way, we hope to have controlled sufficiently for confounding variables that will bias the estimation of the impact of land degradation on crop yields. A small number of shared characteristics reveal tendencies of "severe" land degradation levels being associated with declining yields as compared to similar sites with "low" degradation levels. However, as we zoom in at more detail some exceptions come to the fore, in particular in areas without fertilizer application. Yet, our overall conclusion is that yield reduction is associated with higher levels of land degradation, irrespective of whether fertilizer is being applied or not.

show abstract

“…The soils of central Argentina are semiarid with a variable moisture regime and humidity restricted to part of the year. This region is generally characterized by poorly developed soils, with little horizon differentiation which are highly drained, with low water-holding capacity and organic matter content (Colazo et al 2010). Due to its poor structure, this soil is highly susceptible to wind and water erosion in vast areas of the region (Peña Zubiate and D'hiriart 2005; Colazo et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Arbuscular mycorrhizal symbiosis regulates physiology and performance of Digitaria eriantha plants subjected to abiotic stresses by modulating antioxidant and jasmonate levels

et al. 2015

View full text Add to dashboard Cite

This study evaluates antioxidant responses and jasmonate regulation in Digitaria eriantha cv. Sudafricana plants inoculated (AM) and non-inoculated (non-AM) with Rhizophagus irregularis and subjected to drought, cold, or salinity. Stomatal conductance, photosynthetic efficiency, biomass production, hydrogen peroxide accumulation, lipid peroxidation, antioxidants enzymes activities, and jasmonate levels were determined. Stomatal conductance and photosynthetic efficiency decreased in AM and non-AM plants under all stress conditions. However, AM plants subjected to drought, salinity, or non-stress conditions showed significantly higher stomatal conductance values. AM plants subjected to drought or non-stress conditions increased their shoot/root biomass ratios, whereas salinity and cold caused a decrease in these ratios. Hydrogen peroxide accumulation, which was high in non-AM plant roots under all treatments, increased significantly in non-AM plant shoots under cold stress and in AM plants under non-stress and drought conditions. Lipid peroxidation increased in the roots of all plants under drought conditions. In shoots, although lipid peroxidation decreased in AM plants under non-stress and cold conditions, it increased under drought and salinity. AM plants consistently showed high catalase (CAT) and ascorbate peroxidase (APX) activity under all treatments. By contrast, the glutathione reductase (GR) and superoxide dismutase (SOD) activity of AM roots was lower than that of non-AM plants and increased in shoots. The endogenous levels of cis-12-oxophytodienoc acid (OPDA), jasmonic acid (JA), and 12-OH-JA showed a significant increase in AM plants as compared to non-AM plants. 11-OH-JA content only increased in AM plants subjected to drought. Results show that D. eriantha is sensitive to drought, salinity, and cold stresses and that inoculation with AM fungi regulates its physiology and performance under such conditions, with antioxidants and jasmonates being involved in this process.

show abstract

Soil dry aggregate stability and wind erodible fraction in a semiarid environment of Argentina

Cited by 134 publications

References 35 publications

Replacing Fallow with Cover Crops in a Semiarid Soil: Effects on Soil Properties

Replacing Fallow with Cover Crops in a Semiarid Soil: Effects on Soil Properties

Quantifying the impact of land degradation on crop production: the case of Senegal

Arbuscular mycorrhizal symbiosis regulates physiology and performance of Digitaria eriantha plants subjected to abiotic stresses by modulating antioxidant and jasmonate levels

Contact Info

Product

Resources

About