Hot water extracted organic matter: chemical composition and temporal variations in a long-term field experiment

1995 ◽  
Vol 20 (1) ◽  
pp. 17-23 ◽  
Author(s):  
P. Leinweber ◽  
H. -R. Schulten ◽  
M. K�rschens
Keyword(s):  
Organic Matter ◽  
Chemical Composition ◽  
Field Experiment ◽  
Temporal Variations ◽  
Hot Water ◽  
Term Field

scholarly journals The changes of soil nitrogen and carbon contents in a long-term field experiment under different systems of nitrogen fertilization

2008 ◽  
Vol 54 (No. 11) ◽  
pp. 463-470 ◽  
Author(s):  
V. Nedvěd ◽  
J. Balík ◽  
J. Černý ◽  
M. Kulhánek ◽  
M. Balíková
Keyword(s):  
Field Experiment ◽  
N Fertilization ◽  
Hot Water ◽  
Control Treatment ◽  
Organic N ◽  
Total N ◽  
C And N ◽  
N Compounds ◽  
Term Field

Content of N and C in soil were investigated in a long-term field experiment under different systems of N fertilization. Chernozem and Cambisol were extracted using hot water (N<sub>hws</sub>, C<sub>hws</sub>) and 0.01M CaCl<sub>2</sub> (N<sub>CaCl2</sub>, C<sub>DOC</sub>). The C<sub>t</sub>/N<sub>t</sub> ratio in Chernozem was 9.6:1 and in Cambisol 6.1:1. The lowest C<sub>t</sub>/N<sub>t</sub> ratio in both experiments was found in the control treatment. Results showed that C and N compounds are less stable in Cambisol, which leads to a higher rate of mineralization. In the Chernozem, N<sub>hws</sub> formed 3.66% from the total N content in the soil whereas N<sub>CaCl2</sub> formed only 0.82%. C<sub>hws</sub> formed 2.98% and C<sub>DOC</sub> 0.34% from total C content. Cambisol contains 4.81% of N<sub>hws</sub> and 0.84% of N<sub>CaCl2</sub> from the total N amount and 5.76% of C<sub>hws</sub> and 0.70% of C<sub>DOC</sub> from the total C content, respectively. Nitrogen extracted by 0.01M CaCl2 formed only 22.4% of N extractable by hot water in Chernozem and 17.5% in Cambisol. The lowest C/N ratios were obtained after the CaCl<sub>2</sub> extraction (3.0–6.2:1). The application of manure increased the content of soil organic N and C compared to the sewage sludge treatments.

scholarly journals Roots contribute more to refractory soil organic matter than above-ground crop residues, as revealed by a long-term field experiment

2011 ◽  
Vol 141 (1-2) ◽  
pp. 184-192 ◽  
Author(s):  
Thomas Kätterer ◽  
Martin Anders Bolinder ◽  
Olof Andrén ◽  
Holger Kirchmann ◽  
Lorenzo Menichetti
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Field Experiment ◽  
Crop Residues ◽  
Term Field

scholarly journals Response of sorption processes of MCPA to the amount and origin of organic matter in a long-term field experiment

2001 ◽  
Vol 52 (2) ◽  
pp. 279-286 ◽  
Author(s):  
G. Haberhauer ◽  
L. Pfeiffer ◽  
M. H. Gerzabek ◽  
H. Kirchmann ◽  
A. J. A. Aquino ◽  
...  
Keyword(s):  
Organic Matter ◽  
Field Experiment ◽  
Term Field

scholarly journals Hot-water extractable C and N as indicators for 4p1000 goals in a temperate-climate long-term field experiment: A case study from Hungary

2021 ◽  
Vol 126 ◽  
pp. 107364
Author(s):  
László Bankó ◽  
Gergely Tóth ◽  
Csaba L. Marton ◽  
Sándor Hoffmann
Keyword(s):  
Field Experiment ◽  
Hot Water ◽  
Temperate Climate ◽  
C And N ◽  
Water Extractable ◽  
Term Field
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