|
|
|
|
|
| Topp, Cairistiona F E; Doyle, Chris J; Watson, Christine A. |
| This report was presented at the UK Organic Research 2002 Conference of the Colloquium of Organic Researchers (COR). Organic farming systems rely on the management of biological cycles for the provision of nutrients, which are crucial to maximising the production from the system. Rotations based on the use of grass-legume leys are central to the concept of organic farming systems, because they have the potential to support both animal production, and a subsequent, exploitative, arable cropping phase. A major challenge in organic farming is managing the supply of nitrogen, since it has a key role in governing both productivity and environmental impact. Hence, within a rotational system, there is a need to understand the complex interactions that are... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions; Farming Systems; Crop husbandry. |
| Ano: 2002 |
URL: http://orgprints.org/8295/1/topp_Framework_assessing_crop_production.pdf |
| |
|
|
| Röös, E.; Mie, A.; Wivstad, Maria; Salomon, E.; Johansson, B.; Gunnarsson, Stefan; Wallenbeck, Anna; Hoffman, Ruben; Nilsson, Ulf; Sundberg, C.; Watson, Christine A. |
| Current organic agriculture performs well in several sustainability domains, like animal welfare, farm profitability and low pesticide use, but yields are commonly lower than in conventional farming. There is now a re-vitalized interest in increasing yields in organic agriculture to provide more organic food for a growing, more affluent population and reduce negative impacts per unit produced. However, past yield increases have been accompanied by several negative side-effects. Here, we review risks and opportunities related to a broad range of sustainability domains associated with increasing yields in organic agriculture in the Northern European context. We identify increased N input, weed, disease and pest control, improved livestock feeding, breeding... |
| Tipo: Journal paper |
Palavras-chave: "Organics" in general; Animal husbandry; Crop husbandry; Food systems; Environmental aspects. |
| Ano: 2018 |
URL: http://orgprints.org/35150/1/Ro%CC%88o%CC%88s2018_Article_RisksAndOpportunitiesOfIncreas.pdf |
| |
|
| |
|
|
| Topp, Cairistiona F E; Watson, Christine A; Stockdale, Elizabeth. |
| This report was presented at the UK Organic Research 2002 Conference.Within organic systems, the successful management of nutrients at the field level is crucial for maximising production and minimising the environmental impacts. This requires that the farmer makes the best possible use of nutrients excreted by the grazing or housed livestock. In addition, the farmer must successfully manage the nutrients built-up in the ley phase of the crop rotation over the whole of the arable phase period. To analyse these complex flows, a nutrient budget model has been developed that describes the spatial and temporal flows within the organic farming system. The concept is analogous to treating nutrients as a currency where the flow of nutrients represents a cashflow.... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Farm nutrient management. |
| Ano: 2002 |
URL: http://orgprints.org/8305/1/topp_nutrients_currency.pdf |
| |
|
|
| Fowler, Susan M; Philipps, Lois; Watson, Christine A. |
| This report was presented at the UK Organic Research 2002 Conference. Organic standards have, since their origin (Soil Association 1967) required high standards of manure management, but in reality, these have not been implemented, possibly because of perceived costs of improved handling. However, a cost/benefit analysis of intermediate steps of nutrient conservation and manure handling may provide a practical solution, optimising retention of nutrients, financial and time inputs and environmental protection. Recent research on composting with conventional manures has quantified nutrient losses from heaps with different treatments (Parkinson et al, 2001). Financial and environmental costs and benefits of different management approaches are discussed. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Farming Systems; Farm nutrient management. |
| Ano: 2002 |
URL: http://orgprints.org/8381/1/fowler_Carrot_nutrient_losses.pdf |
| |
|
| |
|
|
| Stockdale, Elizabeth A; Watson, Christine A. |
| This report was presented at the UK Organic Research 2002 Conference. On organic farms it is important that a balance between inputs and outputs of nutrients is achieved. This paper collates nutrient budgets collated at the farm scale for 88 farms in 9 temperate countries. The majority of budgets were compiled for dairy farms (56). All the nitrogen budgets showed an N surplus (average 83 kg N ha-1 year-1). The phosphorus (P) and potassium (K) budgets showed both surpluses and deficits (average 3.4 kg P ha-1 year-1; 13.7 kg K ha-1 year-1). For all nutrients as nutrient inputs increased the surplus increased more significantly than the nutrient outputs. Overall, the data illustrate the diversity of management systems in place on organic farms, which... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Farm nutrient management. |
| Ano: 2002 |
URL: http://orgprints.org/8380/1/Stockdale_watson_Nutrient_budgets.pdf |
| |
|
|
|
