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(Elsevier, 2002)Groups of 20-week-old white (Lohmann LSL) and brown (Lohmann Brown) hens were reared under helminth-free conditions and both divided into two subgroups. One subgroup was artificially infected with 250 embryonated Ascaridia ...
(LANDWIRTSCHAFTSVERLAG GMBH, 2002)The process costs on the farm are very high, if they are compared with the costs of farms in the east of germany or with intensive grassland management e.g. in,Schleswig Holstein". They are even higher if the yield in ...