Humic acid composition and soil fertility of soils near an ancient charcoal kiln: are they similar to Terra Preta de Índios soils?

2018 ◽  
Vol 19 (3) ◽  
pp. 1374-1381 ◽  
Author(s):  
Aline Furtado Rodrigues ◽  
Etelvino Henrique Novotny ◽  
Heike Knicker ◽  
Rogério Ribeiro de Oliveira
Keyword(s):  
Humic Acid ◽  
Soil Fertility ◽  
Acid Composition ◽  
Terra Preta

Humus accumulation, humification, and humic acid composition in soils of two post-mining chronosequences after coal mining

2012 ◽  
Vol 13 (3) ◽  
pp. 491-500 ◽  
Author(s):  
Evgeniy Vasilyevitch Abakumov ◽  
Tomáš Cajthaml ◽  
Jiří Brus ◽  
Jan Frouz
Keyword(s):  
Humic Acid ◽  
Coal Mining ◽  
Acid Composition ◽  
Humus Accumulation

scholarly journals Suitability of Electronic Nose as a Reflective Tool to the Measurement of Soil Fertility Factors

2018 ◽  
Vol 13 (2) ◽  
pp. 39-47
Author(s):  
S. Lavanya ◽  
V. Krishna Murthy
Keyword(s):  
Heat Treatment ◽  
Humic Acid ◽  
Soil Fertility ◽  
Fulvic Acid ◽  
Electronic Nose ◽  
Agricultural Soils ◽  
Sensor Response ◽  
Small Unit ◽  
Treated Soil ◽  
Heat Treated

Humic Acid (HA) and Fulvic Acid (FA) contribute prominently to soil fertility. They are aromatic in nature and hence can be determined by sensory array. This is apparently the first report on the employment of Electronic nose (E-nose) to detect HA and FA extracted from soil. The aim was to evaluate the E-nose sensor response to HA and FA chemically extracted from different agricultural soils. Humic acid and Fulvic acid were extracted from collected agricultural soils and the aroma was measured by E-nose from each of the seven soils. Their presence was confirmed by fluorescence spectroscopy. The Norm Aroma Index (NAI) was measured for: soil, soil after heat treatment, heat treated soil amended with extracted HA, heat treated soil amended with extracted FA, extracted HA and extracted FA. The NAI values were descending in the order: heat treated soil amended with extracted HA/FA, extracted HA/FA, soil (untreated) and heat treated soil. This indicates that HA and FA are detected by E-nose. It was also observed that the most sensitive sensors were 2, 3, 4, 8 and 5 for all agricultural soils tested. Out of the eight sensors in the sensory array of E-nose, above mentioned sensors consistently exhibited high response and these sensors when customized into a small unit may act as a soil fertility tester.Kathmandu University Journal of Science, Engineering and TechnologyVol. 13, No. 2, 2017, page: 39-47

scholarly journals Humic acid composition and humification processes in wetland soils of a Mediterranean semiarid wetland

2017 ◽  
Vol 17 (8) ◽  
pp. 2104-2115 ◽  
Author(s):  
Juan Carlos Rodríguez-Murillo ◽  
Gonzalo Almendros ◽  
Heike Knicker
Keyword(s):  
Humic Acid ◽  
Acid Composition ◽  
Wetland Soils

scholarly journals Effects of long-term fertilization on soil humic acid composition and structure in Black Soil

PLoS ONE ◽  
2017 ◽  
Vol 12 (11) ◽  
pp. e0186918 ◽  
Author(s):  
Jiuming Zhang ◽  
Jingkuan Wang ◽  
Tingting An ◽  
Dan Wei ◽  
Fengqin Chi ◽  
...  
Keyword(s):  
Humic Acid ◽  
Acid Composition ◽  
Black Soil ◽  
Composition And Structure ◽  
Soil Humic Acid
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