HUMIC ACID ASSOCIATED PHOSPHORUS IN SOME SOILS OF ALBERTA

1963 ◽  
Vol 43 (2) ◽  
pp. 235-241 ◽  
Author(s):  
J. F. Dormaar
Keyword(s):  
Organic Matter ◽  
Humic Acid ◽  
Electrophoretic Mobility ◽  
Organic Phosphorus ◽  
Paper Electrophoresis ◽  
Acid Fraction ◽  
Soil Group ◽  
Soil Organic Phosphorus ◽  
Electrophoresis Technique ◽  
Soil Groups

The association of phosphorus with the humic acid fraction of the organic matter of surface horizons of soils representing six soil zones of Alberta was investigated with the aid of paper-electrophoresis. In order to locate the humic acid phosphates following separation, several techniques were combined and modified.The application of the electrophoresis technique proved to be useful in the study of soil organic phosphorus. It seems that the humic acid phosphates from the various soils can be arranged into three groups of increasing complexity and electrophoretic mobility. The humic acid associated phosphorus from members of the Brown and Dark Brown Great Soil Groups showed low electrophoretic mobility and seemed rather uncomplicated, while the greatest variation was found in the humic acid fraction of the member from the Grey Wooded Great Soil Group.

HUMUS FRACTION RATIOS AS A MEANS OF DISCRIMINATING BETWEEN HORIZON TYPES

1980 ◽  
Vol 60 (2) ◽  
pp. 219-229 ◽  
Author(s):  
L. E. LOWE
Keyword(s):  
Organic Matter ◽  
Humic Acid ◽  
Carbon Content ◽  
Fulvic Acid ◽  
Soil Classification ◽  
Acid Fraction ◽  
Humus Fraction ◽  
Wide Range ◽  
Fraction Distribution

Humus fraction distribution in a wide range of horizon samples was examined by measuring carbon content in humic acid (Ch), in fulvic acid (Cf) and in the strongly colored polyphenolic component of the fulvic acid fraction (Ca). Fraction distribution was described by the ratios Ch/Cf and Ca/Cf. It was concluded that humus fraction ratios were related to horizon types as used in the Canadian System of Soil Classification, and were effective in discriminating between certain horizon types, particularly between Luvisolic Bt and Podzolic Bf. The results also suggested that humus fraction ratios may be effective in separating distinct sub-populations within Ah horizons and Bf horizons in general, based on qualitative differences in organic matter present. Aspects of the role of humus fractions in soil genesis are discussed.

PASTURE STUDIES XII THE NATURE OF THE ORGANIC PHOSPHORUS IN SOILS

1937 ◽  
Vol 15b (11) ◽  
pp. 475-479 ◽  
Author(s):  
C. L. Wrenshall ◽  
R. R. McKibbin
Keyword(s):  
Nucleic Acid ◽  
Phosphoric Acid ◽  
Organic Phosphorus ◽  
Acid Fraction ◽  
Soil Organic Phosphorus ◽  
Soluble Phosphorus ◽  
Pentose Sugar

An improved procedure for the separation of nucleic acid material from soil is described. By its use as much as 65% of the apparent organic phosphorus in soil has been separated in the nucleic acid fraction; this shows that most of the soil organic phosphorus exists in this form. Material of this nature enters the soil solution.The material separated yielded, on hydrolysis, phosphoric acid, pentose sugar, adenine, and uracil. This indicates that it is a mixture of mononucleotides.The presence of traces of ether-soluble phosphorus in soil was confirmed.

scholarly journals Pedogenical Distribution of some Micronutrients in Prevailing Sub Great Soil Group in Iraq

2021 ◽  
Vol 34 (2) ◽  
pp. 253-266
Author(s):  
Ali H. I. Al-Bayati ◽  
AbdulKarem A. M. Alalwany ◽  
Mohammed Abdal-Mnam Hassan
Keyword(s):  
Organic Matter ◽  
Calcium Carbonate ◽  
Soil Properties ◽  
Total Content ◽  
Critical Limit ◽  
Soil Group ◽  
Manganese Zinc ◽  
Chemical Soil ◽  
Physical And Chemical ◽  
Soil Groups

The study included the analysis of (341) samples from eight pedons cover most of the prevailing sub great soil groups in Iraq, which are (Typic Torrifluvents, Typic Torrients, Typic Gypsiorthids, Typic Calciorthids, Aquollic Salorthids, Typic Chromoxerects, Typic Xerrochrepts and Typic Calcixerects) to study the pedogenetic distribution of total and bioavailable content of the manganese, zinc, copper, and iron also its relationship with some soil properties. Results showed significant differences between the studied regions of total content of microelements, the bioavailability content also showed a significant deference between the studied regions. The physical and chemical soil properties clearly affected on their content of micronutrient and 77% of the studied samples were below the critical limit for zinc, but 65% of the studied samples were under the critical limit for iron. This refers to the response of the cultivated crops in such sub great soil groups to the addition of Zn and Fe fertilizers, also pedogenetic distribution of the content of these microelements showed a decrease with depth and compatible with the distribution of each of the separated clay and organic matter and decrease with the increase in the soil content of calcium carbonate.

Characterization of dissolved organic matter (DOM) extracted from soils by hot water percolation (HWP)

2010 ◽  
Vol 59 (1) ◽  
pp. 99-108 ◽  
Author(s):  
M. Takács ◽  
Gy. Füleky
Keyword(s):  
Organic Matter ◽  
Humic Acid ◽  
Natural Organic Matter ◽  
Extraction Methods ◽  
Soil Samples ◽  
Hot Water ◽  
Soil Extracts ◽  
Water Percolation ◽  
Soil Humic Acid

The Hot Water Percolation (HWP) technique for preparing soil extracts has several advantages: it is easily carried out, fast, and several parameters can be measured from the same solution. The object of this study was to examine the possible use of HWP extracts for the characterization of soil organic matter. The HPLC-SEC chromatograms, UV-VIS and fluorescence properties of the HWP extracts were studied and the results were compared with those of the International Humic Substances Society (IHSS) Soil Humic Acid (HA), IHSS Soil Fulvic Acid (FA) and IHSS Suwannee Natural Organic Matter (NOM) standards as well as their HA counterparts isolated by traditional extraction methods from the original soil samples. The DOM of the HWP solution is probably a mixture of organic materials, which have some characteristics similar to the Soil FA fractions and NOM. The HWP extracted organic material can be studied and characterized using simple techniques, like UV-VIS and fluorescence spectroscopy.

Characteristics of fouling due to clay-organic substances in potable water treatment by ultrafiltration

1996 ◽  
Vol 34 (9) ◽  
pp. 157-164 ◽  
Author(s):  
Kim C.-H. ◽  
M. Hosomi ◽  
A. Murakami ◽  
M. Okada
Keyword(s):  
Molecular Weight ◽  
Organic Matter ◽  
Humic Acid ◽  
Fulvic Acid ◽  
Size Distribution ◽  
Ultrafiltration Membrane ◽  
Organic Substances ◽  
Decomposition Products ◽  
Microbial Decomposition ◽  
Fouling Materials

Effects of clay on fouling due to organic substances and clay were evaluated by model fouling materials and kaolin. Model fouling materials selected were protein, polysaccharide, fulvic acid, humic acid and algogenic matter (EOM:ectracellular organic matter, microbial decomposition products) and kaolin was selected as the clay material. Polysulfone membrane (MWCO(Molecular Weight Cut-Off) 10,000, 50,000 and 200,000) was used as an ultrafiltration membrane. In particular, the flux measurement of solutions containing algogenic matter used an ultrafiltration membrane of MWCO 50,000. The flux of protein and polysaccharide with coexistence of kaolin increased in the case of the ratio of MW/MWCO being greater than one, but did not increase in the case of the MW/MWCO ratio being below one. In contrast, the flux of fulvic acid and humic acid with coextence of kaolin decreased regardless of the ratio of MW/MWCO. The addition of dispersion agent and coagulant in the organic substances and kaolin mixture solution changed the size distribution of kaolin, and resulted in a change of the flux. EOM and microbial decomposition products decreased with the increase of the fraction of organic matter having molecular weight more than MWCO of membrane. The flux of the algogenic organic matter with coexistence of kaolin decreased with the increase of the amount of kaolin. It was suggested that the decline of the flux with coexistence of kaolin was due to the change of the resistance of the kaolin cake layer corresponding to the change in kaolin size distribution with charge.

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