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Catch Crops in Organic Farming Systems without Livestock Husbandry - Model Simulations Organic Eprints
Müller, Dr. Torsten; Magid, Dr. Jakob; Jensen, Dr. Lars Stoumann; Nielsen, Dr. Niels Erik; Thorup-Kristensen, Dr. Kristian.
During the last years, an increasing number of stockless farms in Europe converted to organic farming practice without re-establishing a livestock. Due to the lack of animal manure as a nutrient input, the relocation and the external input of nutrients is limited in those organic cropping systems. The introduction of a one-year green manure fallow in a 4-year crop rotation, including clover-grass mixtures as a green manure crop is the classical strategy to solve at least some of the problems related to the missing livestock. The development of new crop rotations, including an extended use of catch crops and annual green manure (legumes) may be another possibility avoiding the economical loss during the fallow year. Modelling of the C and N turnover in...
Tipo: Conference paper, poster, etc. Palavras-chave: Nutrient turnover; Production systems; Crop combinations and interactions; Vegetables; Soil biology.
Ano: 2002 URL: http://orgprints.org/127/1/0830.pdf
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Catch Crops in Organic Farming Systems without Livestock Husbandry - Simulations with the DAISY model Organic Eprints
Müller, Torsten; Thorup-Kristensen, Kristian; Magid, Jakob; Jensen, Lars Stoumann; Hansen, Søren.
This paper presents simulations of the soil-plant-atmosphere model DAISY based on an organic crop rotation with incorporation of different catch crops following pea as a leguminous cash crop. Special emphasise was put on the simulation of N-mineralisation/-immobilisation and of soil microbial biomass N. The DAISY model was able to simulate soil mineral N and soil microbial biomass N after soil incorporation of catch crop plant residues to some extend. Several processes need further attention and may be integrated into the DAISY model: (1) soil tillage induced mobilisation of organic material including considerable amounts of organic N, (2) winter killing of sensitive plant species and varieties, (3) decomposition of plant residues at the soil surface as...
Tipo: Journal paper Palavras-chave: Nutrient turnover; Crop combinations and interactions; Production systems; Air and water emissions.
Ano: 2006 URL: http://orgprints.org/7886/2/7886.pdf
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CAUSES OF SOIL MALFUNCTIONING IN DEGRADED AREAS OF EUROPEAN AND TURKISH VINEYARDS Organic Eprints
Costantini, E.A.C.; Priori, S.; Giffard, B.; Fulchin, E.; Tardaguila, J.; Schroers, H.J.; Pelengic, R.; Akca, E.; Tangolar, S.; Valboa, G..
A study was carried out in nineteen vineyards of five countries, well representative of major viticultural districts, which showed areas with fertility problems, consequence of strong soil erosion occurred during either pre-planting or ordinary cultivation. The comparison between degraded and non-degraded areas highlighted that the soil features limiting water nutrition and enhancing potential water stress were the most frequent discriminant soil conditions. Low nitrogen availability was the second most important cause of soil malfunctioning, together with low organic matter content. The degradation was also reflected in the very low values of the C/N ratio, pointing to a difficulty of microbiota in synthetizing humus. Other limiting factor were excessive...
Tipo: Journal paper Palavras-chave: Soil quality; Nutrient turnover; Soil; Farm nutrient management.
Ano: 2018 URL: http://orgprints.org/33458/1/7906-25845-1-PB.pdf
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Changes in light fraction soil organic matter and in organic carbon and nitrogen in compost amended soils Organic Eprints
Owen, Ms. Josée; Lynch, Dr. Derek; Fillmore, Ms. Sherry.
Organic vegetable growers can use compost to supply crops with nutrients and increase soil organic matter (OM), but little information is available about the transformations of compost OM over time in organically managed systems. This study examined light fraction soil organic matter (LFSOM) and organic carbon (C) and nitrogen (N) in organically and conventionally managed snap bean cropping systems (continuous beans (CB) and a fully phased beans/fall rye rotation (BR)) following three years of fertility treatments (1x and 3x compost, and 1x synthetic fertiliser, where 1x provided 50 kg ha-1 N). Light fraction C and N increased with compost amendment, with the C:N ratio significantly lower in composted plots than in synthetically fertilised plots. Rotation...
Tipo: Conference paper, poster, etc. Palavras-chave: Nutrient turnover; Soil quality.
Ano: 2008 URL: http://orgprints.org/11791/2/Owen_11791_ed.doc
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Changes in mineral content and CO2 release from organic greenhouse soils incubated under two different temperatures and moisture conditions Organic Eprints
Pepin, Steeve; Dorais, Martine; Gruyer, Nicolas; Ménard, Claudine.
In organic greenhouse vegetable productions, the turnover rate of organic amendments may be a limiting factor for optimal crop productivity and quality. Hence, we determined the mineralization potential of several organic greenhouse soils maintained at two temperatures (17, 23C) and water potentials (–35, –250 mbars). Replicate cores of structurally intact soils were collected in plastic cylinders, saturated with water and adjusted to the appropriate matric potential. Additional soil samples were sieved, placed in glass jars and incubated under the same treatment conditions. Soil nutrients, gas concentration (O2, CO2, N2O) and microbial activity (CO2 release) were measured over a 25-week period during aerobic incubation. Large variations in nutrient and...
Tipo: Conference paper, poster, etc. Palavras-chave: Nutrient turnover; Soil biology.
Ano: 2008 URL: http://orgprints.org/12713/1/Pepin_12713_ed.doc
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Changes in the nutrient content of agricultural soil on conversion to organic farming, in relation to farm level nutrient balances and soil contents of clay and organic matter. Organic Eprints
Løes, Anne-Kristin; Øgaard, Anne Falk.
Agricultural soil on 12 farms converting to organic farming was sampled in 1989 and 1995 at the same sample points. Concentrations of plant-available (-AL) P, K, Ca and Mg, HNO3-soluble K, tot- N, tot-C and pH were measured in two layers. The average K-AL concentration and pH were reduced in both layers. The average P-AL concentration was reduced in the topsoil. K-AL and P-AL increased in samples with low concentrations and decreased in samples with high and very high concentrations in 1989. The total N concentration increased in the subsoil. Tot-N and tot-C increased in top- and subsoil with a low organic matter content. The net import of P, calculated by farm level nutrient balances, was negatively correlated to the change in kg P-AL per hectare in the...
Tipo: Journal paper Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 1997 URL: http://orgprints.org/5945/1/Acta_1997%2C_Changes_in_the_nutrient_content...pdf
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Changes of yield responses and soil test values in Finnish soils in relation to cumulative phosphorus and potassium balances Organic Eprints
Saarela, Into.
Field experiments with five rates of annual P fertilisation were carried out at 24 sites in Finland 1977-1994. A summary of the yield results was calculated on the basis of the amounts of P recommended to cereals according to STP in early 1990s. The effects of repeated K fertilisation were studied at 21 sites in 1977-1994.
Tipo: Conference paper, poster, etc. Palavras-chave: Nutrient turnover.
Ano: 2008 URL: http://orgprints.org/15813/1/longterm.pdf
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Ciclagem de nutrientes por àrvores em sistemas agroflorestais na Mata Atlântica. Organic Eprints
Duarte, Edivânia Maria Gourete.
Os sistemas agro florestais são efetivos em melhorar e conservar a qualidade do solo. As árvores presentes nestes sistemas absorvem nutrientes de camadas profundas do solo e aportam continuamente material orgânico, gerando impactos à superfície e abaixo da superfície do solo. O objetivo deste trabalho foi estudar características envolvidas na cidagem de nutrientes de espécies arbóreas, visando contribuir para a formulação de estratégias de manejo de sistems agroflorestais. As espécies selecionadas para o estudo foram o ipê-preto (Zeyheria tuberculosa), o açoita-cavalo (Luehea grandiflora), o mulungu (Erythrina verna), o fedegoso (Senna macranthera), o ingá (Ingá subnuda), o papagaio (Aegiphila sellowiana) e o abacate (Persea americana). A produção de...
Tipo: Thesis Palavras-chave: Farm economics; Nutrient turnover; Social aspects; Soil tillage; Farm nutrient management.
Ano: 2007 URL: http://orgprints.org/21742/1/Duarte_Ciclagem.pdf
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CN-SIM - a model for the turnover of soil organic matter. I: Long term carbon development Organic Eprints
Petersen, B.M.; Berntsen, J.; Hansen, S.; Jensen, L.S..
A computer model is presented that describes the flow of C and N in the soil. It employs a structure with conceptual compartments. Organic matter is represented by seven different compartments, two for added matter, two for soil microbial biomass, one for microbial residues, one for native organic matter, and one for inert organic matter. The latter pool probably represents both truly inert matter, and matter with a very slow turnover. This paper describes the parameterisation and performance of this model on selected long-term field data from United Kingdom, Sweden and Denmark. Statistical methods were employed to optimise parameters, and obtain proximate confidence intervals for these parameters. Very satisfactory simulations could be acquired, using the...
Tipo: Journal paper Palavras-chave: Nutrient turnover.
Ano: 2005 URL: http://orgprints.org/87/1/87.pdf
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CN-SIM - a model for the turnover of soil organic mattter. II: Short term carbon and nitrogen development Organic Eprints
Petersen, B.M.; Jensen, L.S.; Berntsen, J.; Hansen, S.; Pedersen, A.; Henriksen, T.M.; Sørensen, P.; Trinsoutrot, I..
A computer model is presented, which describes the transformations of C and N in the soil. The development has been divided into two interdependent tasks, the first being development of long-term SOC simulation capabilities, and the second being short-term simulations of C and N, as described in this paper. A number of existing, independent laboratory experiments, covering a range of amendments, have been used for this task. The amendments includes a variety of different crop residues and animal manure. These experiments have included measurements of 13C, 14C and 15N in various pools, and the model facilitates the simulation of these isotopes. Non-linear, automated optimisation procedures were utilised wherever feasible. The model generally yielded good...
Tipo: Journal paper Palavras-chave: Nutrient turnover.
Ano: 2005 URL: http://orgprints.org/88/1/88.pdf
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Collembola’s role in regulating mass fluxes in soil and the effects of contrasting life histories Organic Eprints
Larsen, Thomas; Krogh, Paul Henning; Magid, Jakob; Hobbie, Erik; Marc, Ventura.
The study determined metabolic rates and elemental pools for two Collembola species with contrasting life histories. The fittest of the two species, P. minuta, excreted the equivalent of 10–12% of the elemental body content per day, and P. armata 7–10%. Most elements are lost to excretion (CO2 and N-waste). These figures in combination with stoichiometry and life histories indicate that the cost of P. minuta’s better fitness is a requirement for a higher quality diet than P. armata. The data produced in this study can be used to estimate the collembolan contribution to C and N fluxes in the soil.
Tipo: Conference paper, poster, etc. Palavras-chave: Nutrient turnover.
Ano: 2006 URL: http://orgprints.org/9257/1/9257.pdf
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Coltivare senza aratro - giova al suolo e al clima Organic Eprints
Krauss, Maike.
Un’agricoltrice che rinuncia all’aratro può generare un arricchimento di humus e più protezione del clima. Perché il metodo funzioni è però necessario un vasto sapere nell’ambito.
Tipo: Newspaper or magazine article Palavras-chave: Nutrient turnover; Soil tillage; Air and water emissions.
Ano: 2017 URL: http://orgprints.org/32228/1/Bioattualit%C3%A0_6_2017_M.Krauss.pdf
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Combination of undersown catch crops and row-hoeing for optimizing nitrogen supply and weed control in organic spring barley Organic Eprints
Phan, Hong TT; Thorup-Kristensen, Kristian.
This is an early result of a field experiment where we aimed to optimize a row cropping system for organic cereal production with the use of undersown cover crops in combination with inter-row hoeing.
Tipo: Conference paper, poster, etc. Palavras-chave: Nutrient turnover; Biodiversity and ecosystem services; Denmark; Farm nutrient management; Knowledge management; Europe; Regulation.
Ano: 2015 URL: http://orgprints.org/33096/1/FSD5%20conference%20paper-Hong.pdf
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Combined Application of Oil Cake and Rice Bran Reduced the Number of Weeds and Increased the Yield of Paddy Rice in a Pad Field Incorporated with White Clover Organic Eprints
Sugimoto, Hideki; Takuya, Araki; Masahiro, Morokuma; Hossain, Shaikh Tanveer.
The combined application of oil cake and rice bran into the soil surface was found useful for weed control in our previous pot study. The present study was undertaken to evaluate the performance of white clover (Trifolium repens L.) while incorporated in the paddy field and effects of combined fertilizer on weed control and rice yield. A plot was divided into two parts i.e. white clover incorporated and not incorporated. The nitrogen content of the incorporated white clover was 12.5 gm-2. Chemical fertilizer and combined fertilizer plots were compared with non-fertilizer conditions. The mixed ratio of combined fertilizer was oil cake 1.35 and rice bran 1.0. Combined fertilizer was applied to the soil surface, and chemical fertilizer was mixed in the soil....
Tipo: Conference paper, poster, etc. Palavras-chave: Soil quality; Nutrient turnover; Weed management; Farm nutrient management.
Ano: 2017 URL: http://orgprints.org/32102/1/9th%20ACSA%202017%20Abstract%202.pdf
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COME RIPRISTINARE LE AREE DEGRADATE NEI VIGNETI Organic Eprints
D'Avino, L..
Si è concluso a fine giugno il Progetto europeo ReSolVe, che ha: - selezionato 19 vigneti biologici in Italia, Francia, Spagna, Slovenia e Turchia; - individuato per ciascun vigneto le aree con una ridotta crescita della vite, bassa resistenza alle malattie e/o scarsa produzione di uva; - testato per 3 anni in modo interdisciplinare gli effetti della concimazione con compost, sovescio e pacciamatura secca con leguminose; -evidenziato vantaggi, criticità e alcuni suggerimenti pratici nell’adozione di ciascuna strategia.
Tipo: Newspaper or magazine article Palavras-chave: Soil quality; Nutrient turnover; Soil; Viticulture.
Ano: 2018 URL: http://orgprints.org/33832/1/Georgofili_info_D%27avino.pdf
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Comparison of effect of zinc-enriched pod of Phaseolus vulgaris and inner rice husk composts with zinc sulphate and zinc 14% chelate on zinc availability in maize plant in a calcareous soil Organic Eprints
Rasouli, Mrs. Shabnam; Azizi, Prof. Pirouz; Forghani, Dr. Akbar; Asghar Zade, Dr. Ahmad.
Mixtures of Zn salts and organic matter have been used successfully in controlling zinc deficiency in various crops. The aim of the present study was to optimize the effectiveness, on zinc availability in maize, of natural organic substances by enriching them with zinc sulfate. For this purpose pod of Phaseolus vulgaris and inner rice husk, as abundant organic wastes in the north of Iran, were incubated with increasing quantities of zinc sulphate. The effect of these zinc-enriched composts, zinc sulphate, and zinc 14% chelate on zinc availability in maize in a calcareous soil was studied in a greenhouse experiment. DTPA-extractable zinc of the soil, total zinc concentration, and chlorophyll of plant leaves were measured. Soil applications of all...
Tipo: Conference paper, poster, etc. Palavras-chave: Nutrient turnover.
Ano: 2008 URL: http://orgprints.org/12318/1/Rasouli_12318_ed.doc
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Competition and complementarity in annual intercrops - the role of plant available nutrients Organic Eprints
Andersen, Mette Klindt.
In the developed regions of the world crops are today primarily grown as sole crops and monocultures. However, increasing awareness of the link between agricultural practise, environmental issues and long-term stability of existing food production systems has put focus on the role that greater crop diversity in time (crop rotation) and space (field size and mixed cropping systems) may play in reducing the extent of these problems. Intercropping represents one way of increasing crop diversity. As a result of differences in the way component crops respond to and affect the environment in which they are grown intercrops may use available growth resources (light, water and nutrients) more efficiently, reduce the prevalence of disease and pests and reduce weed...
Tipo: Thesis Palavras-chave: Nutrient turnover; Crop combinations and interactions; Weed management; Biodiversity and ecosystem services.
Ano: 2005 URL: http://orgprints.org/6003/1/6003.pdf
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Competitive forbs in high-producing temporary grasslands with perennial ryegrass and red clover can increase plant diversity and herbage yield Organic Eprints
Dhamala, N.R.; Søegaard, K.; Eriksen, J..
European agriculture focuses on increasing biodiversity. However, in highly productive temporary grasslands in grass / arable systems, the biodiversity is usually low. Three non-leguminous species have shown high competitive strength in temporary grasslands and ample possibility to increase biodiversity without compromising yields. In this experiment, we examined in detail the competitiveness and productivity of the three forb species: chicory (Cichorium intybus), ribwort plantain (Plantago lanceolata) and caraway (Carum carvi) grown in different proportions in mixtures including traditional grassland species: perennial ryegrass (Lolium perenne) and red clover (Trifolium pratense), with fertiliser application as an additional factor. Dry matter (DM) yield...
Tipo: Conference paper, poster, etc. Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2015 URL: http://orgprints.org/34987/1/Grassland%20and%20forages%20in%20high%20output%20dairy%20farming%20systems.pdf
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Competitive Nitrogen Uptake of Creeping Thistle (C. arvense) and Spring Barley from different soil depths Organic Eprints
Wacker, Tomke Susanne.
The effect of cover crops on nitrogen uptake and competition between thistles and a barley crop was studied using 15N labelling of the autumn soil N pool. The effects was followed by soil and plant measurements of 15N enrichment in the following year, in plots where 15N had been added to plots grown with cover crops or plots subjected to autumn tillage
Tipo: Thesis Palavras-chave: Crop combinations and interactions; Nutrient turnover; Soil tillage; Weed management; Post harvest management and techniques.
Ano: 2017 URL: http://orgprints.org/33092/1/final.pdf
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Composition of hydrolysable amino acids in soil organic matter and soil microbial biomass Organic Eprints
Friedel, Jürgen K.; Scheller, Edwin.
We hydrolysed (6 M HC1) soll organic matter (SOM) from mineral top-soil horizons, litter, and the fraction rendered extractable by 0.5 M K2SO4 after Chloroform fumigation from eight soils under arable, grassland and forest use. covering a wide ränge of site conditions. Our aims were to quantify amino acid contents in the hydrolysate derived from whole soil. litter and soil microbial biomass, respectively. We also wanted to test if the pattern of hydrolysable amino acids of the whole soil is uniform irrespective of site conditions and land use. and if there i s a relation with the amino acid pattern of the respective soil microbial Community. The content of hydrolysable amino acids in the whole soil was higher in the soil samples from grassland and forest...
Tipo: Journal paper Palavras-chave: Nutrient turnover; Soil biology.
Ano: 2002 URL: http://orgprints.org/1372/1/kein%2DDokument.pdf
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