Origin, Management and Reclamation Technologies of Salt-Affected and Flooded Soils in the Inland Pampas of Argentina

2020 ◽  
pp. 209-228
Author(s):  
Miguel A. Taboada ◽  
Francisco Damiano ◽  
José M. Cisneros ◽  
Raúl S. Lavado
Keyword(s):  
Flooded Soils

scholarly journals Vegetational changes during the last millennium inferred from a palynological record from the Bananal Island, Tocantins, Brazil

2015 ◽  
Vol 45 (2) ◽  
pp. 215-230 ◽  
Author(s):  
Laís Aguiar da Silveira MENDES ◽  
Etiene Fabbrin PIRES ◽  
Maria Ecilene Nunes da Silva MENESES ◽  
Hermann BEHLING
Keyword(s):  
Radiocarbon Dating ◽  
Last Millennium ◽  
Flooded Soils ◽  
Marsh Vegetation ◽  
Small Lake ◽  
The World ◽  
Sedimentary Core ◽  
Wet Climate ◽  
Previous Phase ◽  
Fluvial Island

The Bananal Island is regarded the largest fluvial island in the world, bounded by Araguaia and Javaés rivers, being located in southwest of Tocantins. The objectives of this work were to provide information about the vegetational changes that occurred at the Bananal Island, in order to contribute to the understanding the dynamics of past and current savanna and areas of ecotones with forests. Thus, a sedimentary core collected from a small lake at the Bananal Island plain was submitted to pollen and radiocarbon dating analyses. The results showed that the last millennium was dominated by forest reflecting a wet climate. At the beginning of the record (920-770 yr cal BP) the wet climate and high rainfall produced flooding during long rainy seasons that maintained the Javaés River connected to the studied lake, and hence, this environment was marked by the presence of a homogenous forest rich in Moraceae/Urticaceae, due to flooded soils occurrence. During the following period (770-304 yr cal BP) the reduced rainfall and shortening of the rainy seasons isolated the lake from the Javaés River for long periods, which caused a diversification of the forest and gave rise to the appearance of the components of floodplain forest and marsh vegetation adapted to waterlogged soils. Since 304 years cal BP to the present day this environment remained dominated by this diverse forest and the lacustrine conditions were also similar to previous phase, with a slight increase of moisture in the last 84 years that caused the increase of Piranhea.

scholarly journals Impacts and management strategies for crop production in waterlogged or flooded soils: A review

2020 ◽  
Vol 112 (3) ◽  
pp. 1475-1501 ◽  
Author(s):  
Gurpreet Kaur ◽  
Gurbir Singh ◽  
Peter P. Motavalli ◽  
Kelly A. Nelson ◽  
John M. Orlowski ◽  
...  
Keyword(s):  
Crop Production ◽  
Management Strategies ◽  
Flooded Soils

scholarly journals Gypsum Amendment Reduces Redox-Induced Phosphorous Release from Freshly Manured, Flooded Soils to Floodwater

2019 ◽  
Vol 48 (1) ◽  
pp. 127-135 ◽  
Author(s):  
Randombage S. Dharmakeerthi ◽  
Darshani Kumaragamage ◽  
Srimathie P. Indraratne ◽  
Doug Goltz
Keyword(s):  
Flooded Soils ◽  
Phosphorous Release

A LABORATORY STUDY OF GLEYING

1965 ◽  
Vol 45 (2) ◽  
pp. 199-206 ◽  
Author(s):  
J. A. McKeague
Keyword(s):  
Organic Matter ◽  
Acetic Acid ◽  
Room Temperature ◽  
Rate Of Change ◽  
Redox Potentials ◽  
Soil Columns ◽  
Flooded Soils ◽  
Soil Material ◽  
Effects Of Temperature ◽  
Extractable Iron

Columns of different soil materials with ground leaves at the surface were maintained for 18 months with the water table continuously above the surface, or fluctuating between the surface and 15 cm. Redox potentials, colors, and extractable iron were determined. The effects of temperature and of organic matter on the rate of change of Eh were studied with flooded soils in test tubes.The rate and degree of development of dull colors and mottling in the soil columns was influenced greatly by the nature of the soil material. Reduction effected marked increases in acetic acid extractable iron from all of the soil materials. Low redox potentials developed rapidly at room temperature in flooded soils containing appreciable amounts of organic matter. Eh values below 0 mv developed slowly in soils at 1 °C and at room temperature in some soils that were almost devoid of organic matter. Release of Fe+2 from ferrous minerals was thought to account for these low Eh values.

Influence of nitrogen fertilisers on the persistence of carbaryl and carbofuran in flooded soils

1984 ◽  
Vol 15 (6) ◽  
pp. 591-599 ◽  
Author(s):  
B. S. Rajagopal ◽  
N. Sethunathan
Keyword(s):  
Flooded Soils

Root Responses to Major Abiotic Stresses in Flooded Soils

Root Genomics ◽  
2010 ◽  
pp. 155-178
Author(s):  
Rogerio O. Sousa ◽  
Antonio Costa de Oliveira
Keyword(s):  
Abiotic Stresses ◽  
Flooded Soils ◽  
Root Responses

scholarly journals The Combined Strategy for iron uptake is not exclusive to domesticated rice (Oryza sativa)

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Andriele Wairich ◽  
Ben Hur Neves de Oliveira ◽  
Ezequiel Barth Arend ◽  
Guilherme Leitão Duarte ◽  
Lucas Roani Ponte ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Iron Uptake ◽  
Wild Progenitor ◽  
Flooded Soils ◽  
Transcriptomic Response ◽  
Fe Uptake ◽  
Aa Genome ◽  
Combined Strategy ◽  
Strategy I ◽  
Uptake Mechanisms

Abstract Iron (Fe) is an essential micronutrient that is frequently inaccessible to plants. Rice (Oryza sativa L.) plants employ the Combined Strategy for Fe uptake, which is composed by all features of Strategy II, common to all Poaceae species, and some features of Strategy I, common to non-Poaceae species. To understand the evolution of Fe uptake mechanisms, we analyzed the root transcriptomic response to Fe deficiency in O. sativa and its wild progenitor O. rufipogon. We identified 622 and 2,017 differentially expressed genes in O. sativa and O. rufipogon, respectively. Among the genes up-regulated in both species, we found Fe transporters associated with Strategy I, such as IRT1, IRT2 and NRAMP1; and genes associated with Strategy II, such as YSL15 and IRO2. In order to evaluate the conservation of these Strategies among other Poaceae, we identified the orthologs of these genes in nine species from the Oryza genus, maize and sorghum, and evaluated their expression profile in response to low Fe condition. Our results indicate that the Combined Strategy is not specific to O. sativa as previously proposed, but also present in species of the Oryza genus closely related to domesticated rice, and originated around the same time the AA genome lineage within Oryza diversified. Therefore, adaptation to Fe2+ acquisition via IRT1 in flooded soils precedes O. sativa domestication.

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