By Houben J., Weyl T.
Methoden der Organischen Chemie (Methods of natural Chemistry, referred to as Houben-Weyl) is a typical reference paintings for chemists engaged in natural synthesis. In volumes on compound sessions, together with all Supplemental volumes, preparative equipment are taken care of comprehensively and seriously. Tables of examples evaluate crucial tools and convey their scope. specified experimental approaches are given for the easiest tools. The reactivity and extra reactions of every compound type also are provided. The vast use of formulation schemes help in making the German-language volumes extra effectively comprehensible to non-German readers.
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All other standards for feed and feed ingredients must be defined by certification programmes. 2 European Union In the European Union, organic farming is implemented, labelled, controlled and marketed according to EC Reg. 2092/91 and its updates. Within the European Union, IFOAM Basic Standards are replaced by EC Reg. 2092/91. Thus, EC Reg. 2092/91 provides a framework for organic farming within the EU based on subsidiary principle and its implementation. It is to a certain extent flexible with respect to adaptation, supplementation, and precision of technical details in respect to national conditions.
Demeter in Germany and Luxembourg state that the natural soil pH must be maintained at all times (Demeter Germany 1995, Demeter Luxembourg 1997). All national bodies are required to follow IFOAM Basic Standards in regard to the ban on synthetic N-fertilisers, etc. However, different certifying bodies have provided their own list of substances permitted for fertilisation. , by KRAV in Sweden, provided that the natural status of the soil is maintained. On the other hand, KRAV does not permit the use of guano.
1998) Therefore, the habitat diversity of organic farm land is assessed to be higher than that of integrated farmed land due to a higher diversity of living conditions. Redman (1992) and Unwin et al. (1995) state that banning synthetic pesticides on organic farms improves the quality of both crop and non-crop habitats. g. 1); and contact zones for neighbouring habitats and structural elements of landscape (hedges, waters) which are protected from nutrient or pesticide drift inputs and therefore guarantee a particularly low level of nutrient supply (Stachow 1998).
Houben-Weyl Methods in Organic Chemistry: Oraganophosphorus Compounds by Houben J., Weyl T.