Seguiment del contingut de nitrats al sòl i en planta en parcel·les comercials de panís al Pla d'Urgell Authors J. M. Villar P. Villar Abstract This paper presents the partial results of the first year monitoring of soil and plant nitrate contents in commercial maize (Zea mays L.) in the Urgell canal irrigated area. The fields have been selected starting from the knowledge of the soils in the area and their spatial representativeness as main criteria. The excess of nitrogen in the area, present in the groundwater as well as in the irrigation water, is due to overfertilisation of the crops, of which maize is one of the most importants. In the monitored fields the applied nitrogen fertiliser ranges from 250 to 350 kg/ha. The first results show that the farmers applications are not related to the initially available soil nitrogen. They also show how the determination of nitrates in the lower part of the stem at the end of the cycle may help to show if the N availability has been excessive. The higher yields, 13.5 Mg/ha are the same with the lower fertilizer applications, with the lower soil N availabilities and with the lower contents of nitrates in the lower part of the stem (0.4 g NNO3/ kg). All of this show there is ample room to rationalize the nitrogen use. Downloads Text complet (Català) Published 2001-03-22 How to Cite Villar, J. M., & Villar, P. (2001). Seguiment del contingut de nitrats al sòl i en planta en parcel·les comercials de panís al Pla d’Urgell. Dossiers Agraris, (5), 99–106. Retrieved from https://revistes.iec.cat/index.php/DA/article/view/23753.001 More Citation Formats ACM ACS APA ABNT Chicago Harvard IEEE MLA Turabian Vancouver Download Citation Endnote/Zotero/Mendeley (RIS) BibTeX Issue 5: Problemes moderns en l'ús del sòls : nitrats Section Articles License The intellectual property of articles belongs to the respective authors.On submitting articles for publication to the journal DOSSIERS AGRARIS, authors accept the following terms:Authors assign to ICEA (a subsidiary of Institut d’Estudis Catalans) the rights of reproduction, communication to the public and distribution of the articles submitted for publication to DOSSIERS AGRARIS.Authors answer to ICEA for the authorship and originality of submitted articles.Authors are responsible for obtaining permission for the reproduction of all graphic material included in articles.ICEA declines all liability for the possible infringement of intellectual property rights by authors.The contents published in the journal, unless otherwise stated in the text or in the graphic material, are subject to a Creative Commons Attribution-NonCommercial-NoDerivs (by-nc-nd) 3.0 Spain licence, the complete text of which may be found at http://creativecommons.org/licenses/by-nc-nd/3.0/es/deed.en. Consequently, the general public is authorised to reproduce, distribute and communicate the work, provided that its authorship and the body publishing it are acknowledged, and that no commercial use and no derivative works are made of it.The journal DOSSIERS AGRARIS is not responsible for the ideas and opinions expressed by the authors of the published articles.