Contrôle de l'azote potentiellement lessivable dans le sol en début de période de lixiviation. Etablissement des valeurs de référence
Vandenberghe, Christophe ; ; et al
in Vandenberghe, Christophe; Colinet, Gilles; Destain, Jean-Pierre (Eds.) et al 2ème Atelier Nitrate - Eau. Evaluation du Programme de Gestion Durable de l'Azote (2013)
Based on observations in the field, for ten years, Gembloux Agro-Bio Tech (ULg) and the Catholic University of Louvain set annual benchmarks for nitrate-nitrogen concentrations in the soil at the ... [more ▼]
Based on observations in the field, for ten years, Gembloux Agro-Bio Tech (ULg) and the Catholic University of Louvain set annual benchmarks for nitrate-nitrogen concentrations in the soil at the beginning of the leaching period (referred to as ‘PLN’ - Potentially Leachable Nitrogen). These values are used as a reference to monitor farmers located in vulnerable zones, with the monitoring being carried out by the Public Service of Wallonia. Soil samples were taken twice a year (October and December) from approximately 250 plots subjected to reasoned nitrogen fertilization. The plots were located within 34 reference farms (constituting the Agricultural Survey Areas). The samples were then analyzed for nitrate-nitrogen content. The results allowed to establish reference values for eight classes of cultivation or meadow. Analysis of the results recorded in 2011, as in previous years, illustrates the importance of “crop” and “year” in establishing reference values. [less ▲]Detailed reference viewed: 16 (5 ULg)
Positive and negative effects of two organic acids used in the control of the honey bee parasitic mite varroa destructor (Anderson) ( Acari: Varroidae).
Mignon, Jacques ; Nguyen, Bach Kim ; Bachelart, Florent et al
in Proceedings of the 15th Benelux Congress of Zoology (2008)Detailed reference viewed: 46 (20 ULg)