La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Phosphorus losses from monitored fields with conservation practices in the Lake Erie Basin, USA
Auteurs :	Douglas R. Smith, Auteur ; Wendy Francesconi, Auteur ; Stan J. Livingston, Auteur ; Chi-hua Huang, Auteur
Type de document :	Article
Dans :	AMBIO (44 MAR 2015)
Article en page(s) :	S319-S331
Langues:	Anglais
Résumé :	Conservation practices are implemented on farm fields in the USA through Farm Bill programs; however, there is a need for greater verification that these practices provide environmental benefits (e.g., water quality). This study was conducted to assess the impact of Farm Bill eligible conservation practices on soluble P (SP) and total P (TP) losses from four fields that were monitored between 2004 and 2013. No-tillage doubled SP loading compared to rotational tillage (e.g., tilled only before planting corn); however, no-tillage decreased TP loading by 69 % compared to rotational tillage. Similarly, grassed waterways were shown to increase SP loads, but not TP loads. A corn-soybean-wheat-oat rotation reduced SP loads by 85 % and TP loads by

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