|
|
|
|
| |
|
|
| Dalgaard, R.; Halberg, N.; Kristensen, I.S.; Larsen, I.. |
| There is a need for valid and representative data regarding the production, resource use and emissions from typical farming systems in Denmark for analysis of the environmental impact of different systems and as input to product oriented analyses such as Life Cycle Assess-ments of basic food items. An inventory of 31 farm types was constructed on the basis of 2138 farm accounts from 1999 selected and weighted to be representative for the Danish farming sector. The farm accounts were grouped according to the major soil types, the num-ber of standard working hours, the most important enterprise (dairy, pig, different cash crops) and the stocking rate (livestock units per hectare). For each group the account data on the average inputs and outputs, land use... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Environmental aspects; Farming Systems. |
| Ano: 2004 |
URL: http://orgprints.org/15491/1/15491.pdf |
| |
|
|
| Dalgaard, R.; Olesen, J.E.; Halberg, N.; Berntsen, J.. |
| De sædskiftemæssige aspekter af energiproduktion i økologisk jordbrug er belyst ved anvendelse af to forskellige tilgangsvinkler ved hjælp af henholdsvis bedriftsmodellen FASSET anvendt på markniveau og ved hjælp af en livscyklusanalyse (LCA) på bedriftsniveau. FASSET-modellen giver mulighed for at vurdere effekter af anvendelse af kløvergræs til biogas på afgrødeudbytte og på miljøeffekter (kvælstofudvaskning og drivhusgasemissioner fra marken). LCA-analyserne giver mulighed for at vurdere effekter på energiproduktion sammenholdt med øvrige kilder til drivhusgasemissioner, herunder emissionerne fra energiforbrug og indkøbt foder. I beregningerne med FASSET-modellen er der taget udgangspunkt i et rent planteavlssædskifte til økologisk jordbrug. I dette... |
| Tipo: Report chapter |
Palavras-chave: Air and water emissions. |
| Ano: 2004 |
URL: http://orgprints.org/4674/1/4674.doc |
| |
|
|
| Dalgaard, R.; Halberg, N.; Kristensen, I.S.; Larsen, I.. |
| There is a need for valid and representative data on the production,resourceuse and emissions from different farm types in Denmark for publicregulation and assessment.The data should be usable for both area-based environmental assessment(e.g. nitrate leaching per ha)and product oriented environmental assessment(e.g. greenhouse gas emissions per kg pork).The objective of this study was to establish a national agricultural model for estimating data on resource use, production and environmentally important emissions for aset of representative farmtypes. Every year a sample of farm accounts is established in order to report Danish agro-economical data to the ‘Farm Accountancy Data Network’ (FADN), and to produce ‘The annual Danish account statistics for... |
| Tipo: Journal paper |
Palavras-chave: Environmental aspects. |
| Ano: 2006 |
URL: http://orgprints.org/15515/1/15515.pdf |
| |
|
|
| Halberg, N.; Dalgaard, R.; Olesen, J.E.; Dalgaard, T.. |
| Organicfarming(OF)principles include the idea of reducing dependence of fossil fuels, but little has been achieved on this objective so far in Danish OF. Energy use and green house gas (GHG)emissions from anaverage 39 ha cash crop farm were calculated and alternative crop rotations for bio-energy production were modeled. Growing rape seed on 10% of the land could produce bio-diesel to replace 50–60% of the tractor diesel used on the farm. Increasing grass-clover area to 20% of the land and using half of this yield for biogas production could change the cash crop farm to an etenergy producer, and reduce GHG emissions while reducing the overall output of products only marginally. Increasing grass-clover area would improve the nutrient management on the farm... |
| Tipo: Journal paper |
Palavras-chave: Farming Systems; Crop husbandry. |
| Ano: 2008 |
URL: http://orgprints.org/15565/1/15565.pdf |
| |
|
|
|
