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Title: Changes in Vertisol properties as affected by organic amendments application rates
Contributor(s): Ghosh, Subhadip (author); Lockwood, Peter V  (author); Daniel, Heiko  (author); Hulugalle, Nilantha  (author); King, Kathleen L (author); Kristiansen, Paul  (author)orcid 
Publication Date: 2011
DOI: 10.1111/j.1475-2743.2011.00333.x
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Abstract: There is considerable global interest in using recycled organic materials because of perceived benefits to soil health and environment. However, information on the effects of organic waste products and their optimal application rates on the quality of heavy clay soils such as Vertisols is sparse. An incubation experiment was therefore conducted using five organic amendments at various rates to identify their optimal application rates, which could improve the quality of the Vertisol. Cotton gin trash, cattle manure, biosolids (dry weight basis 7.5-120 t/ha), chicken manure (dry weight basis 2.25-36 t/ha) and a liquefied vermicast (60-960 L/ha, volumetric basis) changed the soil chemical, physical and microbiological properties compared with a control where no amendments were applied, viz. higher light fraction of organic matter, nutrient content (N and P) and soil microbial activity. Higher application of chicken manure resulted in an increase in dry-sieved mean weight diameter. Increasing rates of cattle manure increased exchangeable Na concentration and ESP. Although vermicast itself did not contribute a significant amount of N into the soil, when applied at higher rates (60-960 L/ha), its application resulted in increased concentration of NO₃-N in soil by amounts ranging from 43 to 429%. Optimal application rates for cattle manure and cotton gin trash were 30 t/ha, whereas for biosolids and chicken manure, the optimum rate was 60-18 t/ha, respectively.
Publication Type: Journal Article
Source of Publication: Soil Use and Management, 27(2), p. 195-204
Publisher: Wiley-Blackwell Publishing Ltd
Place of Publication: United Kingdom
ISSN: 1475-2743
Field of Research (FOR): 050205 Environmental Management
050305 Soil Physics
050301 Carbon Sequestration Science
Socio-Economic Outcome Codes: 829804 Management of Solid Waste from Plant Production
820301 Cotton
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
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