Eliminating Nitrate Interference During Kjeldahl Digestion of Soil Extracts for Microbial Biomass Determination

1994 ◽  
Vol 58 (2) ◽  
pp. 357-360 ◽  
Author(s):  
L. J. Wyland ◽  
L. E. Jackson ◽  
P. D. Brooks
Keyword(s):  
Microbial Biomass ◽  
Soil Extracts ◽  
Kjeldahl Digestion ◽  
Biomass Determination

Total carbohydrates of the soil microbial biomass in 0.5 M K2SO4 soil extracts

1996 ◽  
Vol 28 (9) ◽  
pp. 1147-1153 ◽  
Author(s):  
Rainer Georg Joergensen ◽  
Torsten Mueller ◽  
Volkmar Wolters
Keyword(s):  
Microbial Biomass ◽  
Soil Microbial Biomass ◽  
Soil Extracts ◽  
Soil Microbial ◽  
Total Carbohydrates

scholarly journals Metode-Metode Penetapan Biomassa Mikroorganisme Tanah secara Langsung dan Tidak Langsung: Kelemaahn dan Keunggulannya(Direct and Indirect Methods of Soil Microbial-Biomass Determination: Weakness and Strength)

2003 ◽  
Vol 5 (1) ◽  
pp. 29-38
Author(s):  
G Djajakirana
Keyword(s):  
Microbial Biomass ◽  
Soil Microbial Biomass ◽  
Indirect Methods ◽  
Soil Microbial ◽  
Biomass Determination ◽  
Direct And Indirect Methods

Dalam dua dasawarsa terakhir ini telah terjadi peningkatan minat para pakar ilmu tanah dan lingkungan dalam menentukan jumlah total mikroorganisme dalam contoh tanah. Minat tersebut muncul karena para pakar menyadari pentingnya peranan mikroorganisme tanah di dalam berbagai proses biokimia yang te'rjadi di dalam sistem tanah, proses retensi dan pelepasan hara serta energi dalam tanah. Setiap usaha untuk menentukan aliran hara dan energi dalam sistem tanah harus mempertimbangkanperanan dari mikroorganisme tanah.

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.

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