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Leonardite: A mined source of humic acid

Descriptive

Language
LanguageTerm (authority = ISO 639-3:2007); (type = text)
English
Genre (authority = RULIB-FS)
Conference Paper or Lecture
Abstract (type = abstract)
Many blueberry growers in South Georgia have expressed interest about using humate as a soil amendment and its effect on fruit production. Presently, pine bark is used to amend soils to increase organic matter and lower pH. Pine bark, generally, is applied at a rate of 100 cubic yards per acre, with a cost from $800.00 to $1,200.00/A. To alleviate establishment costs, some growers incorporate Leonardite and/or its extracts, humic and fulvic acids, to increase organic matter. To extract humic and fulvic acid, the Leonardite is processed in a strongly basic aqueous solution, e.g. KOH. To precipitate the humic acid, the solution is adjusted to pH 1 with a mineral acid, e.g. H2SO4. Three Leonardite products, two humic acids and one unextracted Leonardite, were analyzed for nutrient content. Calcium levels were 5000 ppm in both extracted samples and 2070 ppm in the unextracted Leonardite. Potassium levels were 977 and 800 ppm in the extracted samples and 125 ppm in the unextracted Leonardite, suggesting humic acid reacted with KOH. Research on Leonardite products and the effect on blueberry production are limited. Rates of humate in ornamental horticulture suggest using 3% – 12% v/v% in potting media. This equates to 30 – 120 t for equivalent additions on a per acre basis. At these rates, the application of calcium will be 124 – 1200 lb/A. Establishing blueberry at levels of 900 lb/A calcium is not recommended. The analysis of these Leonardite products is insightful as soil nutritional amendments to blueberry.
OriginInfo
DateCreated (encoding = w3cdtf); (qualifier = exact); (keyDate = yes)
2014
Extension
DescriptiveEvent
Type
Conference
Place
Atlantic City, N.J.
AssociatedEntity
Role
Sponsor
Name
North American Blueberry Research and Extension Workers
DateTime (point = start); (encoding = w3cdtf)
2014-06-23
DateTime (point = end); (encoding = w3cdtf)
2014-06-26
Note
Paper presented at NABREW Conference, Paper Session I:Blueberry Culture, on June 24, 2014, Atlantic City, N.J.
TypeOfResource
Text
PhysicalDescription
Extent
6 p.
InternetMediaType
application/pdf
TitleInfo
Title
Leonardite: A mined source of humic acid
Subject (authority = local)
Topic
Blueberry Culture
Subject (authority = local)
Topic
Leonardite
Subject (authority = LCSH)
Topic
Humic acid
Subject (authority = LCSH)
Topic
Plant nutrients
Name (type = personal)
NamePart (type = family)
Smith
NamePart (type = given)
Erick D.
Affiliation
University of Georgia
Role
RoleTerm (type = text); (authority = marcrt)
author
DisplayForm
Erick D. Smith
Name (type = personal)
NamePart (type = family)
Jacobs
NamePart (type = given)
James L.
Affiliation
University of Georgia
DisplayForm
James L. Jacobs
Role
RoleTerm (type = text); (authority = marcrt)
author
RelatedItem (type = has document)
TitleInfo
Title
Smith, Erick, Proceedings of the North American Blueberry Research and Extension Workers Conference-license
Identifier (type = doi)
doi:10.7282/T3B56MD1
RelatedItem (type = host)
TitleInfo
Title
Proceedings of the North American Blueberry Research and Extension Workers Conference
Identifier (type = local)
rucore00000002295
Location
PhysicalLocation (authority = marcorg); (displayLabel = Rutgers, The State University of New Jersey)
NjNbRU
Identifier (type = doi)
doi:10.7282/T38S4RM6
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Copyright for scholarly resources published in RUcore is retained by the copyright holder. By virtue of its appearance in this open access medium, you are free to use this resource, with proper attribution, in educational and other non-commercial settings. Other uses, such as reproduction or republication, may require the permission of the copyright holder.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
RightsEvent
Type
Permission or license
DateTime (encoding = w3cdtf); (qualifier = exact)
2015-03-04
AssociatedObject
Type
License
Name
Non-exclusive license for Leonardite: A mined source of humic acid
Reference (type = digital)
http://dx.doi.org/doi:10.7282/T3B56MD1
AssociatedEntity
Role
Copyright holder
Name
Erick Smith
RightsHolder (type = personal)
Name
FamilyName
Smith
GivenName
Erick
MiddleName
D.
Role
Copyright holder
RightsHolder (type = personal)
Name
FamilyName
Jacobs
GivenName
James
MiddleName
L.
Role
Copyright holder
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Technical

RULTechMD (ID = TECHNICAL1)
ContentModel
Document
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