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Article
Importance du stade dernière feuille dans les schémas de lutte fongicide contre les maladies du blé d'hiver en Belgique.
Authors: --- --- ---
Year: 1991 Publisher: [S.l.] : [s.n.],

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Keywords

Winter wheat --- Maladie --- Belgium


Book
Control strategies for jointed goatgrass, volunteer rye, and downy brome
Authors: ---
Year: 1995 Publisher: [Akron, Colo.] : USDA-SCS,

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Book
Crop rotation, soil water content & wheat yields : using these relationships can help you estimate wheat yields before you plant
Authors: ---
Year: 2002 Publisher: Akron, CO : USDA-ARS, Central Great Plains Research Station,

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Periodical
Winter wheat seedings.
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Year: 2000 Publisher: Washington, D.C. : Agricultural Statistics Board, NASS, USDA

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Book
Crop rotation, soil water content & wheat yields : using these relationships can help you estimate wheat yields before you plant
Authors: ---
Year: 2002 Publisher: Akron, CO : USDA-ARS, Central Great Plains Research Station,

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Book
Control strategies for jointed goatgrass, volunteer rye, and downy brome
Authors: ---
Year: 1995 Publisher: [Akron, Colo.] : USDA-SCS,

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Periodical
Winter wheat seedings.
Author:
Year: 2000 Publisher: Washington, D.C. : Agricultural Statistics Board, NASS, USDA

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Dissertation
Spatialisation d'un modèle de culture à l'échelle wallonne : Potentiel et limites
Authors: --- --- --- --- --- et al.
Year: 2017 Publisher: Liège Université de Liège (ULiège)

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Les modèles de culture sont de plus en plus utilisés à travers le monde comme appui à l’agriculture et comme outils d’aide à la décision. Dans ce cadre, le modèle de culture SALUS, développé au Michigan par Bruno Basso, a été calibré, validé et spatialisé à l’échelle de la Wallonie. L’objectif principal de cette étude est de déterminer le potentiel du modèle de culture ainsi que ses limites sous les conditions rencontrées dans nos régions.&#13;Pour cela, des bases de données météorologiques (PAMESEB) et pédologiques (CNSW) ont été préparées. Ensuite, le modèle a été calibré selon les observations réalisées au sein d’un champ de la faculté agronomique de Gembloux pour 7 managements azotés et 6 saisons culturales. Au niveau de la spatialisation, deux dates de semis et trois managements azotés différents ont été testés pour 21 saisons. &#13;La calibration a montré que le modèle était peu adapté à nos régions pour l’ensemble des sorties du modèle, excepté pour la simulation de la biomasse. Les résultats des simulations sur la biomasse totale, les rendements en grains et les gains unitaires ont également montré que ces sorties étaient principalement influencées par les variables climatiques. Il a donc été conclu qu’en l’état, le modèle est difficilement utilisable de manière efficiente en Wallonie. Crop models are more and more used throughout the world as support for agriculture and as tools for decision makings. In this context, SALUS crop model, developed at Michigan by Bruno Basso, was calibrated, validated and spatialized at the scale of the Wallonia. The main purpose of this study is to determine the potential and the limits of the crop model under meteorological conditions in our regions. &#13;For that, meteorological (Pameseb) and pedological (CNSW) data bases were prepared. Then, the model was calibrated according to the observations realised within a field of the agronomic faculty of Gembloux for 7 nitrogen management and 6 cultural seasons. For the spatialization, two planting dates and three nitrogen management were tested for 21 seasons. &#13;The calibration shown that the model is few adapted for our regions for all outputs of the model, except for the biomass. Results of the simulation of the biomass, the yields and the units gains are also shown that the outputs are mainly influenced by the meteorological conditions. It has therefor been concluded that, as it stands, the model is difficult to use efficiently in Wallonia.


Dissertation
Mechanistic modelling of gross primary production from sun-induced fluorescence measurements on a wheat canopy in Belgium
Authors: --- --- --- --- --- et al.
Year: 2022 Publisher: Liège Université de Liège (ULiège)

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In the context of global climate change, extreme weather events are expected to intensify, threatening agricultural systems. Meanwhile, food demand is likely to grow due to increas-&#13;ing human population. Accordingly, being able to assess and predict dynamic behaviours of&#13;crops under changing climatic conditions is crucial to ensure food security. For that purpose,&#13;photosynthesis is the key process to characterise. According to the literature, sun-induced flu-&#13;orescence (SIF) represents a potential indicator of photosynthesis. Recently, the mechanistic&#13;light response model (MLR) estimating gross primary production (GPP) from SIF has been&#13;established. Firstly, this study aims to assess the relationship between SIF and GPP from the&#13;MLR model perspective for a winter wheat canopy in Belgium. Secondly, the dynamics of the&#13;main model parameters depending on environmental conditions have been studied. Continuous&#13;measurements of micro-meteorological, flux and SIF data have been carried out for five months&#13;by an ICOS station. Moreover, leaf-level gas exchange and fluorescence parameters have been&#13;measured manually using a portable photosynthesis system. Similar temporal evolutions of SIF&#13;and GPP in response to light have been observed, supporting the use of SIF as an indicator&#13;of photosynthesis. The model provides a relatively moderate performance at half-hourly scale&#13;which improved at daily scale. In particular, the model seems to correctly reproduce the SIF-&#13;GPP relationship only under low light intensities and high soil moisture which is in agreement&#13;with the main model assumption. Overall, these results point out the need for more accurate&#13;characterization of the model underlying processes and parameters dynamics regarding envi- ronmental conditions.


Multi
Plant morphological characters and grain yield in winter wheat (Triticum aestivum L. em. Thell.)
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ISBN: 2870790082 9782870790083 Year: 1984 Publisher: Louvain-la-Neuve : UCL (Université Catholique de Louvain),

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