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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

Actif (Le fournisseur de données a soumis des métadonnées au cours de la dernière année civile)
Journal Article

Article de revue

Soil restoration in semiarid Patagonia: Chemical and biological response to different compost quality  [2007]

Kowaljow, E.; Mazzarino, M.J.;

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Restoration of soils burned by a wildfire using composted amendments of different origin (biosolids and municipal organic wastes) and final particle size (screened and unscreened) was studied after 6 and 12 months of application in a field trial in semiarid NW Patagonia. Composts were applied at 40 Mg ha-1. A fertilized treatment with soluble N (100 kg ha-1) and P (35 kg ha-1), and a non-treated control were also included. As indicators of soil response, chemical (electrical conductivity, pH, organic C, total N, extractable P), biological (potential microbial respiration, potential net N mineralization, N retained in microbial biomass) and physical (temperature and soil moisture) properties were evaluated. Plant soil cover was also estimated. Soil chemical and biological properties showed a high response to organic amendment addition, more evident after the wet season (12 months of application). Soil organic C, total N and extractable P increased significantly with biosolids composts (BC), and soil pH with municipal composts (MC). Potential microbial C respiration and net N mineralization were similar for both MC and BC, and significantly higher than in the control and the inorganic fertilized treatment; when calculated on C or N basis the highest values corresponded to MC. Results imply that in terms of organic C accretion, BC were more effective than MC due to higher amounts of total and recalcitrant C. Screened and unscreened composts did not differ sig
nificantly in their effects on soil properties. The increase of organic C with BC did not contribute to increase soil moisture, which was even higher in control plots after the wet season; higher plant cover and water consumption in amended plots could also explain this pattern. Inorganic fertilization enhanced higher plant cover than organic amendments, but did not contribute to soil restoration.
(Revue
Soil biology & biochemistry
ISSN : 0038-0717

Information bibliographique

Langue:
English
Type:
Journal Article
Sur AGRIS depuis:
2013
Volume:
39 issue 7
Page initiale:
1580
Page finale:
1588
Tous les titres:
"Soil restoration in semiarid Patagonia: Chemical and biological response to different compost quality"@eng
Autre:
"Includes references"
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Information bibliographique

Langue:
English
Type:
Journal Article
Sur AGRIS depuis:
2013
Volume:
39 issue 7
Page initiale:
1580
Page finale:
1588
Tous les titres:
"Soil restoration in semiarid Patagonia: Chemical and biological response to different compost quality"@eng
Autre:
"Includes references"