Complete genomes were also determined for bacteria capable of anaerobic degradation of halogenated hydrocarbons by halorespiration. The ~ Mb genomes of Dehalococcoides ethenogenes strain 195, Dehalococcoides strain CBDB1 and ~ Mb genome of Desulfitobacterium hafniense strain Y51 have been sequenced. Characteristic of all these bacteria is the presence of multiple paralogous genes for reductive dehalogenases, implicating a wider dehalogenating spectrum of the organisms than previously known. Moreover, genome sequences provide unprecedented insights into the evolution of reductive dehalogenation and differing strategies for niche adaptation ( Heider and Rabus, 2008 ).
Carefully prepare a plan for conversion. Try 10 per cent to 20 per cent the first year. Pick one of the best fields to start with and expand organic acreage as knowledge and confidence are gained. It may take five to 10 years to become totally organic, but a long term approach is often more successful than a rapid conversion, especially when financial constraints are considered. Parallel production (producing both organic and conventional versions of the same crop or livestock product) is not allowed. Use good sanitation, visually different varieties, individual animal identification and other systems to maintain separation and integrity of the organic and conventional products. Good records are essential.