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| Registros recuperados: 641 | |
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| Stavridou, Eleftheria; Thorup-Kristensen, Kristian; Young, Scott D.. |
| Selenium (Se) release from four plant species (Indian mustard, fodder radish, Italian ryegrass and hairy vetch) was measured under controlled leaching conditions and in a pot incubation experiment as part of a study of the potential for using these plant species as Se catch crops. Catch crops may reduce Se leaching and, by subsequent release of Se from the plant material, increase the available Se for succeeding crops. Plants grown both without and with Se addition (250 g Se/ha) were tested. In the leaching experiment, frozen plant material was incorporated into soil columns and incubated at room temperature for up to 19 weeks. The results showed that Se concentrations in the leachate were higher when Se-enriched plant material was incorporated in the... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover; Farm nutrient management. |
| Ano: 2011 |
URL: http://orgprints.org/19589/4/19589.pdf |
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| Alföldi, Thomas; Fliessbach, Andreas; Hasinger, Gerhard. |
| This video explains how to take out a handy soil profile and how to interpret it by using the spade test. The video is addressed to farmers, advisors and scientist. After the introductory part of determining the objectives of the test and of comparing it with other methods, the user gets a detailed presentation on how to extract, prepare and judge a sample. This is done by judging its colour and odour characteristics. Furthermore, it is explained how the stratification, structure and texture of a sample can be assessed by using the finger test, the drop test and observations. This helps evaluate your findings. In the short term, you can find out whether your field is ready for tillage or whether it is too wet. In the long term, it helps you get to know... |
| Tipo: Practice tool |
Palavras-chave: Soil quality; Soil; Farm nutrient management. |
| Ano: 2016 |
URL: http://orgprints.org/30993/1/video.php_y%3Dhttps_%252F%252Fwww.youtube.com%252Fwatch_v%3DTEeLeHplhmY |
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| Padel, Susanne. |
| This is the final report for Defra Project OF0159. The Organic Conversion Planner (OrgPlan) is a computer program for farmers and advisors reducing the time input necessary for planning a conversion to organic farming. Conversion planning can help to identify whether organic management is suited to the farm and potential problems during the conversion period itself. This involves an assessment of the current situation of the farm, based on which proposals for an organic 'target (endpoint)' can be developed. This includes proposed rotation(s), cropping and stocking plan for the specific farm situation and the proposals need to be tested for their technical and financial feasibility, including impact on forage supply, nutrient requirements and financial... |
| Tipo: Report |
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Farm nutrient management; Technology transfer; Animal husbandry; Farm economics. |
| Ano: 2001 |
URL: http://orgprints.org/7980/1/OF0159_2147_FRP.pdf |
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| Nicholas, Phillipa; Padel, Susanne; Cuttle, S P; Fowler, S M; Hovi, M; Lampkin, N H; Weller, R F. |
| Organic farming aims to create an integrated, humane, environmentally and economically sustainable agricultural system. For organic dairy systems, the fulfilment of these aims requires the understanding and integration of a number of systems components including land use (mixed or dairy only) and stocking rate; grassland and forage production (including quantity and quality); potential milk yield (and milk quality); animal nutrition (largely farm based) and health; environmental sustainability such as farm nutrient balance; the financial status of the farm (including enterprise performance, fixed costs and labour use and farm income and profit) and finally the policy environment in which organic dairy systems operate. This review discusses worldwide... |
| Tipo: Journal paper |
Palavras-chave: Dairy cattle; Farm nutrient management; Feeding and growth; Farm economics. |
| Ano: 2004 |
URL: http://orgprints.org/10861/1/BAH_dairy_review_paper.pdf |
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| Stavridou, Eleftheria. |
| Selenium (Se) and glucosinolates has been found to have beneficial effects for human health. The most common way to increase Se and glucosinolates in plants is through using inorganic fertilizers however, concerns over environmental contamination by fertilizers increased the demand for sustainable produced foods. Thus, the aim of this project was to evaluate the efficiency of different crop management strategies (catch crops, intercropping) to increase Se and glucosinolates concentrations in plants rather than the application of agrochemicals. Catch crops have been used successfully to reduce sulphur and nitrogen leaching and increase nutrient availability for the succeeding, similar beneficial effects on Se may be expected. Nitrogen and sulphur... |
| Tipo: Thesis |
Palavras-chave: Crop combinations and interactions; Vegetables; Farm nutrient management. |
| Ano: 2011 |
URL: http://orgprints.org/19590/1/Ph.d_Eleftheria_Stavridou.pdf |
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| Brown, Sarah. |
| This webinar is focused on nutrient management on organic systems. It is addressed to US farmers, especially in the part dedicated to regulations. Agronomic information presented by the relator will be useful also for European organic farmers, both experts and newcomers. It is organised in sections: US regulations; evaluation of crops nutrient requirements; evaluation of nutrients release from organic matter, amendments and cover crops; fertilization, timing and application methods; leaching and runoff risk. Data values are presented in US units of measure: pounds per acre. The conversion factor to kg per ha is nearly 1 (1.12), so quite straightforward. |
| Tipo: Practice tool |
Palavras-chave: Soil quality; Nutrient turnover; Farm nutrient management. |
| Ano: 2014 |
URL: http://orgprints.org/32602/1/Nutrient_budgetWeb.png |
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| Dalgaard, Tommy; Hutchings, Nicholas J.; Dragosits, U.; Olesen, J.E.; Kjeldsen, Chris; Drouet, J.L.; Cellier, P.. |
| The aim of this study is to illustrate the importance of farm scale heterogeneity on nitrogen (N) losses in agricultural landscapes. Results are exemplified with a chain of N models calculating farm-N balances and distributing the N-surplus to N-losses (volatilisation, denitrification, leaching) and soil-N accumulation/release in a Danish landscape. Possible non-linearities in upscaling are assessed by comparing average model results based on (i) individual farm level calculations and (ii) averaged inputs at landscape level. Effects of the non-linearities that appear when scaling up from farm to landscape are demonstrated. Especially in relation to ammonia losses the non-linearity between livestock density and N-loss is significant (p > 0.999), with... |
| Tipo: Journal paper |
Palavras-chave: Air and water emissions; Landscape and recreation; Farm nutrient management. |
| Ano: 2011 |
URL: http://orgprints.org/19043/4/19043.pdf |
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| Hauggaard-Nielsen, H; Ambus, P; Dalgaard, T; Johansen, A; Jørgensen, U; Nielsen, A.M.; Nielsen, L.H.; Olesen, J.E.; Roepstorff, A; Skytte, K; Smith, J.E.; Thomsen, A.B.; Thomsen, M.H.; Jensen, E.S.. |
| Energy production and energy use in organic agriculture (OA) need to be addressed in order to reduce the reliance on non-renewable fossil fuels and minimize greenhouse gas (GHG) emissions. Thus, there is an obligation to find consensus between the apparent opposing aims of renewable (bio) energy production and soil fertility in OA. This project aims at designing and evaluate a combined concept for biomass and bio-energy production in OA, while considering soil fertility. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Farm nutrient management; Biodiversity and ecosystem services; Social aspects; Technology assessment; Air and water emissions; Farm economics. |
| Ano: 2007 |
URL: http://orgprints.org/11312/1/NJF2007%2DBioConcens.pdf |
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| Law-Ogbomo, K.E.; Osaigbovo, A.U.; Ogedegbe, S.. |
| A field was carried out on an ultisol in humid area of Edo State, Nigeria to evaluate the effects of plant density and cattle dung manure application on soil nutrient status and okra pod yield. Treatments consisted of three levels of cow dung (0, 300 and 450 kg N ha-1) and three plant densities (47,619, 66,666 and 83,333 plants per hectare (pph)). A 3 x 3 factorial arrangement fitted into randomized complete block design and replicated three times. Data were collected on soil chemical properties and pod yield of okra. Routine analysis of the soil indicated that the soil was low in nutrient content, thus addition of cattle dung to the soil at various levels influenced the soil nutrient status positively. After cropping with okra, cattle dung application had... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Production systems; Composting and manuring; Nutrient turnover; Environmental aspects; Farm nutrient management. |
| Ano: 2014 |
URL: http://orgprints.org/22646/1/22646%20Cattle%20dung%20trial_MM.pdf |
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| Heinäaho, Merja; Pusenius, Jyrki; Julkunen-Tiitto, Riitta. |
| - Berries, juice and other products of organically cultivated sea buckthorn (Hippophae rhamnoides L., Eleagnaceae) are in great demand because of their beneficial health effects. The availability of berries is not sufficient especially for locally growing market. However no research has been done on the effects of farming methods on the quality of sea buckthorn tissues before. We established a field experiment to study the effects of organic farming methods on the concentra-tions of phenolic compounds in leaves of two Finnish sea buckthorn cultivars ”Terhi” and ”Tytti”. 560 one and half years old seedlings were planted into 9 spatial blocks in coastal area in Merikarvia, western Finland in 2003. Different fertilizers and mulches were applied to the... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Farm nutrient management. |
| Ano: 2006 |
URL: http://orgprints.org/7382/1/Presentation_in_Denmark.rtf |
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| Gonçalves, Alexandre. |
| A produção de alimentos orgânicos é uma atividade que vem sendo desenvolvida por agricultores familiares de diferentes regiões do Brasil. A comercialização desses produtos tem especificidades, é composta por diferentes canais e um sistema de certificação dos produtos. A produção e certificação orgânica formam uma rede que articula pontos localizados em diferentes partes do mundo. Os pressupostos ligados a produção orgânica envolvem aspectos econômicos, ambientais e sociais. Através deste estudo procurou-se compreender como os agricultores de Poço Fundo - Minas Gerias percebem e relacionam-se com a produção e comercialização de alimentos orgânicos. Para isto, utilizou-se um referencial teórico que mantém interfaces com diferentes disciplinas, como... |
| Tipo: Thesis |
Palavras-chave: Farm economics; Farming Systems; Social aspects; Farm nutrient management. |
| Ano: 2003 |
URL: http://orgprints.org/24844/1/Gon%C3%A7alves_Agroecologia.pdf |
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| Kristensen, T.; Tvedegaard, N.; Kristensen, I.S.. |
| Organic livestock farms, at least in the northern part of Europe, are dominated by rather specialized units with production based on only one type of livestock, as dairy cows. The specialization is followed by a steady increase in size of the production unit, both in number of livestock and area belonging to the farm. In Denmark has the average organic dairy farm changed from 83 cows and 100 ha in 2000 to 136 cows and 172 ha in 2010; also production per cow has increased in this period from 6825 kg milk annually to 8100 kg in 2010. Such rather large changes over a decade often results in layout of the farm with long distance from the dairy facilities to the farm land. In organic dairy farming this is especially challenging as the dairy herd need to have... |
| Tipo: Journal paper |
Palavras-chave: Dairy cattle; Farm economics; Farm nutrient management. |
| Ano: 2012 |
URL: http://orgprints.org/20633/5/20633.pdf |
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| Hauggaard-Nielsen, Henrik; Jensen, Erik Steen; Carter, Mette S.; Johansen, Anders; Ambus, Per. |
| In contrast to energy technologies like solar and wind, energy in the form of biomass can be stored and bioenergy produced when needed using a wide range of technologies. However, a substantial rise in the use of biomass for energy is expected, which means additional pressure on farmland sustainability. Organic agriculture (OA) is facing a big challenge producing bioenergy from local resources and on the same time maintaining soil fertility. There is a clear goal to reduce reliance on fossil fuels and thereby decrease greenhouse gas emissions, but the question is how to reach it? In a four year ICROFS (www.icrofs.org) project titled “BioConcens” (www.bioconcens.elr.dk/uk/) one objective is to design and test a strip intercropping concept. Strip... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions; Farm nutrient management. |
| Ano: 2009 |
URL: http://orgprints.org/18950/3/18950_paper.pdf |
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| Canet, Rodolfo. |
| Técnicas de cultivo innovadoras para incrementar la salud del suelo en el cultivo ecológico de frutales: el proyecto BIO-INCROP Rodolfo Canet Castelló. Colaborador Científico Adjunto del Centro para el Desarrollo de la Agricultura Sostenible del Instituto Valenciano de Investigaciones Agrarias (CDAS-IVIA) Caídas de producción, desórdenes de crecimiento o incluso muerte de las plantas debido a enfermedades del suelo son comunes en cultivos plurianuales como los frutales. En estos casos, junto a la presencia de patógenos en el suelo, adquieren una especial relevancia los niveles de actividad y diversidad microbiológica del suelo. El mantenimiento de estos y el reconocimiento de su función dentro de los agrosistemas son fundamentales en la práctica de... |
| Tipo: Newspaper or magazine article |
Palavras-chave: Soil quality; Biodiversity and ecosystem services; Farm nutrient management. |
| Ano: 2012 |
URL: http://orgprints.org/20681/1/revista_AE_N%C2%BA7_I%2BD%2Bi_Gallardo_13marzo.pdf |
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| Halberg, Niels; Kristensen, Ib Sillebak; Møller, Berit E.. |
| At begrænse tabet af nærringsstoffer til det omgivende miljø indgår som en del af mange landmænds mål for god driftledelse. Det er vanskeligt at måle eller beregne det faktiske tab af kvælstof fra husdyrbedrifter, og der findes endnu ingen modeller, som kan beregne de enkelte tabsposter rimeligt præcist og samtidigt redegør for den samlede omsætning af kvælstof (N) på bedriften. Separate opgørelser af udnyttelse og tab af N fra enten besætning eller marker giver et mangelfuldt billede af bedriftens reelle udnyttelse af N. Derimod kan en beregning af en husdyrbedrifts samlede omsætning og overskud af N give et godt udtryk for det potentielle N-tab til det omgivende miljø. Ved DJF er der i flere år udført analyser af N-omsætningen og N-udnyttelse i... |
| Tipo: Newspaper or magazine article |
Palavras-chave: Farm nutrient management; Air and water emissions. |
| Ano: 1998 |
URL: http://orgprints.org/13116/1/13116.pdf |
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| CALEGARI, A.; TOURDONNET, S.; TESSIER, D.; RHEINHEIMER, D. S.; RALISCH, R.; HARGROVE, W. L.; GUIMARÃES,, M. F.; TAVARES FILHO, J.. |
| This work aims to evaluate the soil physical properties affected by cover crop rotation and soil management in a long-term experiment in southern Brazil. The experiment was established in 1986, with treatments combining six winter treatments and two tillage systems (conventional and no tillage). Bulk density, porosity, aggregate-size class distribution, and organic carbon content of the aggregates were determined at six depths. Bulk density was not affected by tillage systems and winter treatments. The soil disturbance by plowing enhanced the macroporosity, decreased the microporosity, and promoted the formation of smaller aggregate size, in comparison to no tillage. Apart from the soil management, all winter species increased the greater aggregate–size... |
| Tipo: Journal paper |
Palavras-chave: Crop combinations and interactions; Soil tillage; Farm nutrient management. |
| Ano: 2013 |
URL: http://orgprints.org/29755/1/Influence%20of%20Soil%20Management%20and%20Crop%20Rotation%20on%20Physical%20Properties%20in%20a%20Long_%20Calegari%20et%20al.%2C%202013.pdf |
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| Registros recuperados: 641 | |
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