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United States Department of Agriculture

Agricultural Research Service

Title: Characterization of Humic Acids from Idaho 'slickspot' Soils

Authors
item Clapp, Charles
item Vial, Ryan
item Clapp, Jay - UNIV OF MINNESOTA
item Cary, Timothy - USCOE CRREL
item Palazzo, Antonio - USCOE CRREL
item Senesi, Nicola - UNIV OF BARI
item Brunetti, Gennaro - UNIV OF BARI
item Hayes, Michael H - UNIV OF LIMERICK
item Schmitt-Rohr, Klaus - IOWA STATE UNIV
item Mao, Jing - IOWA STATE UNIV

Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: May 3, 2004
Publication Date: November 1, 2004
Citation: Vial, R.S., Clapp, C.E., Clapp, J.J., Cary, T.J., Palazzo, A.J., Senesi, N., Brunetti, G., Hayes, M.B., Schmitt-Rohr, K., Mao, J.D. 2004. Characterization of humic acids from Idaho 'Slickspot' soils. ASA-CSSA-SSSA Annual Meeting Abstracts. Paper No. 5712.

Technical Abstract: Naturally-occurring humic substances in soils hold promise as a factor related to restoring native plants. We have characterized the humic acids (HAs) of the Juniper Butte Range (JBR) soils, in Idaho, and determined carbon compounds that may promote the establishment of slickspot peppergrass (Lepidium papilliferum) seedlings. Research included isolation and characterization of JBR soils in terms of HA content and relating this information to soil type and climate. Humic acids were extracted using a modified IHSS method, and isolated by membrane filtration, precipitated, dialyzed, and freeze-dried. Elemental analyses showed minor differences between HAs, with surface samples having higher C and N values. Differences were also noted between sample sites for carbohydrates, amino acids, and acidity components. FTIR, fluorescence, and CPMAS 13C-NMR spectra provided valuable characterization and compositional information.

Last Modified: 11/28/2014
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