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| Thomsen, Ingrid Kaag; Sørensen, Peter. |
| Soil tillage serves a number of purposes such as control of weeds, incorporation of crop residues and manures, and maintenance or improvement of soil mechanical properties, including seedbed preparations. As a side-effect, soil tillage may affect turnover of organic matter (OM) by changing the particle size and spatial distribution of crop and manure residues in soil and by increasing the intimacy of residue/soil contacts. By breaking soil structural elements, tillage may contribute further to N mineralization by exposing physically protected organic matter to microbial turnover. Therefore, adjusting the time, intensity and frequency of soil tillage operations may enable optimization of synchrony, defined as the matching through time of N availability and... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover. |
| Ano: 2004 |
URL: http://orgprints.org/4579/1/4579.PDF |
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| Celette, Florian; Peigne, Joséphine; Thomsen, Ingrid Kaag; Carcea, Marina; Aveline, Anne; Hellou, Guénaëlle; Mäder, Paul; Hiltbrunner, Jürg; Mayer, Jochen; Dubois, David; Thommen, Andreas; Schweinzer, Agnes; Friedel, Juergen K.; David, Christophe. |
| A common handbook was conceived in the CORE Organic AGTEC-Org project in order to give some elements of field trial monitoring. |
| Tipo: Working paper |
Palavras-chave: Crop combinations and interactions Composting and manuring Soil tillage Soil Crop health; Quality; Protection Weed management. |
| Ano: 2008 |
URL: http://orgprints.org/16461/1/AGTEC_Agronomy_Handbook_of_Methods.pdf |
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| Thomsen, Ingrid Kaag. |
| Dyrket jord i Danmark indeholder 6-12 t N/ha i de øverste 50 cm. Hvert år mineraliseres en lille del af dette til plantetilgængeligt kvælstof, men langt hovedparten forbliver på organisk form, og er således ikke tilgængeligt for planteoptagelse. Når der kun mineraliseres lidt af jordens totale kvælstofindhold skyldes det dels at kvælstoffet er på en form der kun langsomt omsættes dels at noget organisk bundet kvælstof er placeret på en måde, der vanskeliggør omsætning, altså er fysisk beskyttet. Noget af det fysisk beskyttede kvælstof kan være placeret i aggregater, hvor der kun er begrænset tilgang af vand og luft, som er nødvendigt i forbindelse med omsætningen. Hvis sådanne aggregater brydes, kan forholdene for det organisk bundne kvælstof påvirkes,... |
| Tipo: Newspaper or magazine article |
Palavras-chave: Nutrient turnover. |
| Ano: 2003 |
URL: http://orgprints.org/1723/1/Landsbladet_2002.doc |
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| Thomsen, Ingrid Kaag; Sørensen, Peter. |
| Jordbearbejdning foretages almindeligvis for at klargøre jorden til såning eller for at nedmulde planterester og gødning. Ligeledes kan jordbearbejdning finde sted både i og uden for vækstsæsonen i forbindelse med mekanisk ukrudtsbekæmpelse. Der er en udbredt opfattelse af, at ukrudtsbekæmpelse, foretaget fx ved radrensning af rækkeafgrøder i vækstsæsonen, også øger mineraliseringen af kvælstof. En øget kvælstofmineralisering formodes at finde sted som følge af, at den mekaniske bearbejdning bryder jordknolde, hvorved der blotlægges organisk materiale, som nedbrydes. Samtidigt fremmer jordbearbejdningen luftskiftet i jorden, og betingelserne for omsætning forventes dermed forbedrede. En øget kvælstofmineralisering som følge af jordbearbejdning... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover. |
| Ano: 2004 |
URL: http://orgprints.org/4580/1/4580.PDF |
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| Sørensen, Peter; Khan, A R; Møller, Henrik B.; Thomsen, Ingrid Kaag. |
| Animal manures and plant-based manures are used for biogas production by anaerobic digestion (AD). After AD the concentration of ammonium-N in manure is increased and the concentration of decomposable C is decreased. Thus, the potential first year fertilizer value of the manure can be increased by the treatment. However, pH is also increased by AD thereby increasing the risk of ammonia losses. The objective of this paper was to compare N turnover in soil after application of digested and corresponding undigested manures, and to compare N fertilizer values of digested manures after direct injection or surface-banding in cereals. After AD of pig and cattle slurry the increase in potential plant availability was equivalent to 10-25% of total manure N. AD of... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Composting and manuring; Nutrient turnover; Farm nutrient management. |
| Ano: 2012 |
URL: http://orgprints.org/21820/1/21820.pdf |
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