References of "Oger, Robert"
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See detailInfluence Of The Grinding Level And Extrusion On The Nutritional Value Of Lupin Seed (Lupinus Albus) For Cattle In The Context Of The Dutch Protein Evaluation System
Froidmont, E.; Bonnet, M.; Oger, Robert ULg et al

in Animal Feed Science and Technology (2008), 142(1-2),

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See detailBulletin agrométéorologique - Situation au 30 septembre 2007
Tychon, Bernard ULg; Schyns, Virginie; Denis, Antoine ULg et al

in Bulletin Agrométéorologique (2007), 6(3), 1-4

Les conditions météorologiques depuis le 20 août dernier, date du dernier bulletin, ont été très proches des conditions normales. Mis à part quelques orages locaux, aucun phénomène météorologique ... [more ▼]

Les conditions météorologiques depuis le 20 août dernier, date du dernier bulletin, ont été très proches des conditions normales. Mis à part quelques orages locaux, aucun phénomène météorologique particulier n’est à signaler. Les rendements satisfaisants à bons annoncés dans le dernier bulletin pour les cultures de maïs, betterave et pomme de terre sont confirmés. [less ▲]

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See detailBulletin agrométéorologique - Situation au 20 août 2007
Tychon, Bernard ULg; Schyns, Virginie; Denis, Antoine ULg et al

in Bulletin Agrométéorologique (2007), 6(2), 1-4

Les conditions météorologiques depuis le début juillet ont été marquées par des pluies fréquentes et parfois violentes en particulier dans le Nord du pays. Aucun stress hydrique n’est à signaler. Les ... [more ▼]

Les conditions météorologiques depuis le début juillet ont été marquées par des pluies fréquentes et parfois violentes en particulier dans le Nord du pays. Aucun stress hydrique n’est à signaler. Les températures de juillet et août sont restées proches de la normale permettant aux cultures de conserver une certaine avance phénologique acquise au printemps, ce qui laisse globalement augurer de bons rendements pour les cultures de maïs, betteraves et pomme de terre. [less ▲]

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See detailDiagnostic agronomique et agro-environnemental des successions culturales en Wallonie (Belgique).
Leteinturier, Béatrice; Tychon, Bernard ULg; Oger, Robert ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2007), 11(1), 27-38

La succession culturale, reconnue comme une notion fondamentale assurant un équilibre tant agronomique au niveau parcellaire qu'agro-environnemental au niveau de l'agro-écosystème, est analysée à l ... [more ▼]

La succession culturale, reconnue comme une notion fondamentale assurant un équilibre tant agronomique au niveau parcellaire qu'agro-environnemental au niveau de l'agro-écosystème, est analysée à l'échelle des régions agricoles qui composent le territoire de la Wallonie (Belgique). L'étude vise à dresser un diagnostic des performances qualitatives des successions culturales, à travers l'analyse individuelle de plusieurs de leurs composantes explicatives telles la qualité des précédents culturaux sur les cultures suivantes, le temps de retour moyen des cultures, le nombre de cultures apparaissant au cours de la succession et enfin la durée des périodes interculturales. Ces quatre composantes sont analysées à l'échelle parcellaire, les résultats étant agrégés au niveau régional. L'étude porte à la fois sur une analyse spatiale basée sur une période de 7 années, ainsi que sur une analyse temporelle visant à observer une éventuelle évolution, région par région, au cours de deux périodes successives de même durée. L'état des lieux ainsi dressé révèle des différences spatiales en termes de pratiques liées aux successions culturales, par contre, une quasi-stabilité dans le temps des paramètres analysés découle des résultats obtenus. Par ailleurs, si ces résultats contribuent à enrichir un état des lieux de l'agriculture en Wallonie, ils peuvent en outre servir de valeurs de référence pour un suivi global de l'évolution des pratiques agricoles régionales. [less ▲]

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See detailThe B-CGMS project : evaluation after 5 years of monitoring and prediction
Curnel, Y.; Oger, Robert ULg; Leteinturier, B. et al

Conference (2006, October)

The B-CGMS project, started in 1998, is the adaptation to Belgian Conditions of the European Crop Growth Monitoring System (CGMS). This project involved 3 Belgian scientific institutes: the Walloon ... [more ▼]

The B-CGMS project, started in 1998, is the adaptation to Belgian Conditions of the European Crop Growth Monitoring System (CGMS). This project involved 3 Belgian scientific institutes: the Walloon agricultural research Centre (CRA-W), the Flemish Institute for Technological Research (VITO) and the University of Liège (ULg). The main difference with the European system is that more detailed inputs (meteorological, soil and NUTS inputs) are used. Crop yields predictions are realised on a monthly basis during the growing season (from April to September) for 6 crops (winter wheat, winter barley, maize, Potato, sugar beet, winter rapeseed). Yields predictions as well as analyses of meteorological situation of the month and RS information on the state of the crops are published in agrometeorological bulletins sent by e-mail since 2002. The information is also available on the Internet website of the project (http://.b-cgms.cra.wallonie.be). Crop yields predictions are produced through a combination of linear regression models which may include different categories of yield indicators (trend, meteo, RS and agrometeorological model outputs). Crop yields predictions procedure is currently semi-automated by the use of a statistical calibration toolbox (StatCaT). The evaluation of the project after 5 years of monitoring and prediction has first shown that final yields predicted B-CGMS as well as the ones predicted by MARS are coherent compared with official yields: no significant differences are observed. As far as the accuracy according to the month for which the prediction is made is concerned, we can notice that at agricultural circumscriptions level and for winter crops a lower precision of B-CGMS is observed before June and that there is no improvement in July (in comparison with June). The same evolution is observed for summer crops before July but in August and September, the prediction accuracy decreases. Even if calibration models present high adjusted coefficient of determination, the technological trend explains an important part of the variability and it is therefore necessary to consider the effect of a year factor on the quality of prediction in order to clearly the interest of the agrometeorological model. For some crops (as potato), adding agrometeorological yield outputs to models including already the technological trend allow to improve the quality of prediction especially for “extreme” year i.e. years where official yields move away significantly from the technological trend. For others crops as winter wheat, this improvement of the quality of prediction is not observed. However, fortunately, adding other yield indicators as meteo indicators can improve in general the quality of prediction and once again especially for “extreme” years. [less ▲]

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See detailGeoTraceAgri final project report (GTA)
Debord, Michel; Chauchard, Alain; Tychon, Bernard ULg et al

Report (2005)

Are the universalisation and the globalisation of trade exchanges synonymous with a standardization in which agro-food products uprooted of their soil will no longer be differentiated from manufacturers ... [more ▼]

Are the universalisation and the globalisation of trade exchanges synonymous with a standardization in which agro-food products uprooted of their soil will no longer be differentiated from manufacturers or supermarket brands? Original food products belong to the inheritance of the territories and the consumers are attracted more and more by their authenticity. The GeoTraceAgri project resolutely supports agriculture and the sustainable promotion of the territory as opposed to universalisation which standardizes and moves away those who produce for consumers. Geotraceability aims at associating information of geographical nature with the traditional data of traceability. Farming origin and operations have become factual and verifi able data is available everywhere in the world, thus making it possible to bring additional guarantees to the signs of quality. The GeoTraceAgri (GTA) project largely contributed to the realisation of geotraceability. With the implementation from January 1,2005 of the new Common Agricultural Policy and its regulation imposing on the Member States a single system of declaration, all the agricultural parcels now form part of a European database of geographical references. This new regulation reinforces the basis of the concept of geotraceability, whereas throughout the project it was necessary to defi ne geo-indicators for integrated or crop production with very few geographical data on the farming precedents. The development of the GTA prototype rests on a decentralized architecture and Web services. It was indeed necessary to conceive a system which is readily accessible on Internet for farmers, co-operatives and collectors, and potentially with the administrations which have control responsibilities. In term of acceptability, the potential users realise the potential economic benefi ts of the concept and of the indicators of geotraceability in their plan of exploitation, on the other hand sociological acceptability is less evident which induces the need for communication to make for its adoption. This fi nal report fi nal illustrates the fi rst stage : the GeoTraceAgri partners are continuing their research on the defi nition of an integrated system of geotraceability for the Common agricultural policy and the plan of analysis of the results of GeoTraceAgri should lead to the marketing within two years of an application making it possible to integrate the geo-indicators into management software for the actors of the agro food chain. [less ▲]

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See detailUse of spot/vegetation in different versions of the European crop growth monitoring system.
Piccard, I.; Eerens, H.; Oger, Robert ULg et al

in Veroustraete, F.; Bartholomé, E.; Verstraeten, W. W. (Eds.) Proceedings of the 2nd international vegetation user conference, 1998-2004 : 6 years of operational activities (2005)

The Crop Growth Monitoring System (CGMS) is a GIS-application, developed and operated since 1989 by the MARS-unit of the EU Joint Research Centre. The primary objective is the timely forecasting of the ... [more ▼]

The Crop Growth Monitoring System (CGMS) is a GIS-application, developed and operated since 1989 by the MARS-unit of the EU Joint Research Centre. The primary objective is the timely forecasting of the yields of the main crops on the Pan-European continent.To reach this goal, CGMS combines all available (historical and actual) resources: official crop statistics, daily meteorological data, specific crop and soil parameters, the predictions of the (spatialized) crop growth model WOFOST, and the 10-daily composite images of NOAA-AVHRR and SPOT-VEGETATION. In recent years CGMS has been implemented in different regions of the world, also beyond Europe. This paper gives a brief overview of some of these applications, with emphasis on the remote sensing component, especially SPOT-VEGETATION. In 2000, JRC outsourced the practical operation of CGMS to a consortium composed by Alterra (main tasks, agrometeorological model), MeteoConsult (meteo-provider) and VITO (remote sensing). MARS-STAT delivers the European yield forecasts to the EU statistical office EUROSTAT, in view of the follow-up of market prices and the achievement of the CAP-regulations. MARS-FOOD particularly deals with important food producing areas (Russia, Mercosur) and famine-threatened zones in Africa (IGAD-zone). The long-term goal is to steadily fill the actual data gaps (crop areas, parameters, meteo,…) so that, in time, the full CGMS (incl. the model) could be applied on these areas (or even globally). Specific versions of CGMS emerged in different countries (Finland, Spain, Kazakhstan,…), running with more detailed input data. One example is the so-called B-CGMS which has been operating since 1998 on behalf of the Belgian ministry of agriculture, in a collaboration between ULg-Arlon, CRA-Gembloux and VITO. Since 2002, the B-CGMS group publishes monthly bulletins with forecasts on crop yields, areas and productions. The areas are delivered by the IACS (annually updated GIS of all crop parcels, maintained for the EU-CAP). Together with local partners, the same Belgian group is now implementing CGMS in China’s north-eastern province Heilongjiang, part of former Manchuria and China’s main producer of soybean, maize and singlecropped rice. Special attention is being paid to the steady drying-out of this region, which 50 years ago was mainly covered by wetlands and forests. Climate change and mismanaged paddy irrigation are leading to a dramatic lowering of the water tables. Technically, this paper will focus on the main deliverables derived from NOAA- AVHRR and SPOT- VEGETATION. This includes pre/post-processing, extraction of biophysical vegetation state parameters (NDVI, SAVI, fAPAR, Dry Matter Productivity), differences with regard to the historical year (VCI, VPI, etc.), quicklooks, etc. Of most concern however is the “ unmixing” approach, which attempts to conform the remote sensing data (image format, 1 km-pixels, different crops mixed) to the CGMS-standards (databases with district/crop as spatial/thematic units). If the low/medium resolution sensors (AVHRR, VEGETATION, MODIS, MERIS,..) want to maintain their role in this agricultural domain, this problem has to be solved. Otherwise, the floor is open for new, revolutionary initiatives such as DMC (Disaster Monitoring Constellation: daily global coverage at 32m resolution). [less ▲]

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See detailUse of remote sensing imagery for geotraceability in agriculture
Buffet, Dominique; Oger, Robert ULg; Tychon, Bernard ULg

Conference (2004, May 06)

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See detailSampling protocols and risk of error significance in molecular detection tests for fruit trees certification.
Kummert, Jean; Malice, Marie ULg; Marbot, Sophie et al

in Acta Horticulturae (2004), (657), 541-546

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See detailGeographical traceabilitiy of food products.
Tychon, Bernard ULg; Oger, Robert ULg

Conference (2003, March)

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See detailUse of medium-resolution imagery in the Belgian crop growth monitoring system (B-CGMS).
Eerens, Herman; Wouters, Katy; Dehem, Didier et al

in Saint, Gilbert (Ed.) Proceedings of Vegetation 2000 : 2 years of operation to prepare the future, Lake Maggiore - Italy - 3-6 April 2000 (2000)

The Belgian Crop Growth Monitoring System (B-CGMS) uses the 1km²-resolution imagery of NOAA-AVHRR and SPOT-VEGETATION to improve its yield estimates. The pre-processed images are converted to fAPAR and ... [more ▼]

The Belgian Crop Growth Monitoring System (B-CGMS) uses the 1km²-resolution imagery of NOAA-AVHRR and SPOT-VEGETATION to improve its yield estimates. The pre-processed images are converted to fAPAR and combined with meteorological data (irradiance, temperature) to daily growth values by means of the Monteith approach. The regional means of the cumulative monthly growth numbers are calibrated against official harvest statistics by means of crop-specific neural networks. The quality of the yield estimates varies with the importance of the crop: the R²-values for winter wheat, sugar-beets and fodder maize are respectively 60%, 48% and 36%. The final yield forecasts will be better, because the B-CGMS integrates the image-based yield estimates with the assessments of the agromet-model and of the technological trend function. The technique of linear unmixing seems promising but in its actual state it is too unpredictable to be included in an operational scheme. [less ▲]

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See detailA web-based mapping application to link. A crop modelling system (B-CGMS) and a GIS database.
Buffet, D.; Oger, Robert ULg; Dehem, D. et al

in Donatelli, Marcello; Stockle, Claudio; Villalobos, Francisco (Eds.) et al International symposium on modelling cropping systems Lleida, 21-23 june, 1999, Book of proceedings (1999, September)

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See detailAdaptation of the European crop growth monitoring system to the Belgian conditions.
Buffet, D.; Dehem, Didier; Wouters, K. et al

Poster (1999, April)

The aim of the Belgian Crop Growth Monitoring System (B-CGMS) is the elaboration of an integrated information system predicting reliable, timely and objective estimates of crop yields and monitoring ... [more ▼]

The aim of the Belgian Crop Growth Monitoring System (B-CGMS) is the elaboration of an integrated information system predicting reliable, timely and objective estimates of crop yields and monitoring calamity sites at regional scales. Seven major crops are concerned by the project : winter wheat, winter barley, fodder maize, winter rape seed, potatoes, sugar beet and permanent meadow. The main tasks in the adaptation of the European model come down to the completion and the improvement of the databases to specify the local conditions and particularities of Belgium, to modify the scale of the forecasting system, to incorporate satellite information and to develop a web-based mapping interface. [less ▲]

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See detailAdaptation of the European crop growth monitoring system to the Belgian conditions.
Tychon, Bernard ULg; Buffet, D.; Dehem, Didier et al

in Donatelli, Marcello; Stockle, Claudio; Villalobos, Francisco (Eds.) et al International symposium on modelling cropping systems Lleida, 21-23 june, 1999, Book of proceedings (1999)

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See detailAperçu climatologique et implications phytotechniques pour les années culturales 1992 et 1993
Oger, Robert ULg; Poelaert, Jean; Bodson, Bernard ULg

in Fumure et protection phytosanitaire des céréales (1994, February)

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See detailCourbes d'excretion fecale de l'oxyde de chrome administre aux vaches laitieres au paturage. Definition d'un echantillonnage biquotidien des feces.
Bartiaux Thill, Nicole; Oger, Robert ULg; Francois, Etienne et al

in Reproduction Nutrition Developpement (1988), 28(1), 87-88

Making allowance for a periodicity of Cr2O3 concentration in the faeces during a 24-hour period, we developed a faecal sampling procedure, simple and compatible with field conditions.

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