This study examined the suitability of three different indicators as entry points for agricultural regulation for limiting excess nitrogen (N) fertilizer inputs in Germany: net soil surface balance, gross farm-gate balance, and fertilization planning. Data on about 6000 farms in Germany were grouped into types for comparative analysis. The design of the regulatory approaches and the reliability of constituent parameters were then examined, and proportions of affected farms and mean N reduction requirements were identified. This revealed that: (a) design and purpose of the regulatory approaches differ, but the data requirements are very similar; (b) the parameters involved differ in reliability and integrity; and (c) the limits for maximum N fertilizer input at farm level vary with approach and farm type.
Die Produktion biobasierter Polymere ist in den letzten Jahren deutlich professioneller und differenzierter geworden. Eine Vielzahl unterschiedlicher Hersteller und Anbieter kamen ins Spiel, um biobasierte Alternativen für praktisch jede Anwendung zu schaffen. Die Kapazitäten und die Produktion biobasierter Materialien werden weiter stark wachsen. Vorhersagen prognostizieren ein Wachstum des globalen Marktes von über 35 % innerhalb der Jahre 2020 bis 2025. Innovative Biopolymere treiben dieses Wachstum voran, allen voran biobasiertes Polypropylen und Polyhdroxyalkanoate.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.