Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 7
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
A framework for assessing crop production from rotations Organic Eprints
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
Imagem não selecionada

Imprime registro no formato completo
An investigation into the relationship between preceding break crops and weed populations in barley crops in organic ley/arable rotations Organic Eprints
Litterick, Audrey M; Watson, Christine A; Robson, Melissa C.
This report was presented at the UK Organic Research 2002 Conference. The relationship between weed populations and cereal crops following nine organic break crops was investigated in field trials in Warwickshire, Aberdeenshire and Ceredigion in 2001. Weed biodiversity was high on all sites and varied between sites in terms of species present. Severity of weed infestation differed significantly between sites and between cereals following different break crops. The impact of break crop species on the incidence and severity of the weed burden in the following cereal is discussed in relation to the field trials at the three sites.
Tipo: Conference paper, poster, etc. Palavras-chave: Weed management; Farming Systems.
Ano: 2002 URL: http://orgprints.org/8408/1/litterick_Break_crops_weeds_barley.pdf
Imagem não selecionada

Imprime registro no formato completo
Carrot or stick? – Would information concerning the economic value of nutrient losses, and their impact on food quality achieve greater environmental protection than regulation? Organic Eprints
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
Imagem não selecionada

Imprime registro no formato completo
Crop protection in organic agriculture - a simple matter? Organic Eprints
Litterick, Audrey M; Watson, Christine A; Atkinson, David.
This report was presented at the UK Organic Research 2002 Conference. Crop protection strategies in organic agriculture and horticulture aim to prevent pest, disease and weed problems through optimisation of the cropping system as a whole. Choice of crops and varieties within the rotation and use of appropriate husbandry practices are critical to the success of the system and direct curative action against pests and diseases is rarely necessary. Research is urgently needed to determine strategies for control of key pests and diseases in organic systems if UK organic agriculture is to expand to meet increasing consumer demand. This paper describes current prevention and control strategies for pests, diseases and weeds in UK organic agriculture and...
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection Weed management Knowledge management.
Ano: 2002 URL: http://orgprints.org/8393/1/litterick_crop_protection.pdf
Imagem não selecionada

Imprime registro no formato completo
Nutrient budgets on organic farms: a review of published Organic Eprints
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
Imagem não selecionada

Imprime registro no formato completo
Risks and opportunities of increasing yields in organic farming. A review Organic Eprints
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
Imagem não selecionada

Imprime registro no formato completo
Utilising the concept of nutrients as a currency within organic farming system Organic Eprints
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
Registros recuperados: 7
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional