Results 81 to 90 of about 787,178 (288)
Integrated ecological hotspot identification of organic egg production [PDF]
, 2009 Ecological sustainability in agriculture is a concept that contains various environmental problems, which are caused by emission of compounds during different processes along the food chain.
Aarnink, A.J.A. +3 more
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Poultry Science, 1935 Abstract KENTUCKY marls or calcareous clays are usually soft, calcareous-magnesian shales or soft, clay-containing magnesian limestone which breaks down on weathering into finely divided particles. In recent years marl has been used extensively because of its cheapness and easy accessibility, as a source of lime for soils.
G. Davis Buckner +2 more
openaire +2 more sources
Organic egg production in Finland - animal health, welfare and food safety issues [PDF]
, 2005 A total of 20 out of 23 commercial organic layer farms took part in the research. Data were collected through observation and by interviewing the producer, using a semi-structured interview guide.
Holma, U. +7 more
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Poultry Science, 2016 &NA; Consumers are concerned about the quality of commercially available eggs. Eggs used in this study were marketed in Portugal and originated from laying hens raised in cages, barns, free‐range, organic eggs, and eggs enriched with n‐3 polyunsaturated ...
M. Lordelo +3 more
semanticscholar +1 more source
Salmonella and campylobacter in organic egg production - with special reference to the Finnish situation [PDF]
, 2005 In Finland, an ongoing (2003-2005) research project on organic egg production, animal welfare and food safety is examining campylobacter and salmonella contamination of approximately 20 organic layer farms.
Hänninen, M. L.
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Occurrence of Salmonella sp in laying hens [PDF]
Revista Brasileira de Ciência Avícola, 2003 This study was carried out to investigate the presence of Salmonella sp in flocks of white laying hens. In different farms, the transport boxes of twelve flocks were inspected at arrival for the presence of Salmonella. Four positive (A, B, L and M) and one negative (I) flocks were monitored at each four weeks using bacteriological examination of cecal ...
Gama, NMSQ +2 more
openaire +7 more sources
Ethological investigation on moulting laying hens in organic farming [PDF]
, 2005 Introduction Organic egg farmers mainly rely on the same hybrids, breeding techniques and production schemes as conventional egg producers. This includes annual replacement of the laying hens.
Hirt, Helen, Zeltner, Esther
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Magnesium Requirement of the Laying Hen ,
Poultry Science, 1968 Abstract THE quantitative requirement for magnesium by laying hens has not been established. The National Research Council in 1966 listed the growing chicken's requirement as 500 mg. magnesium per kilogram of feed, but gave no estimate of the hen's requirement while Edwards et al. (1961) showed that the phosphorus level of the hen's diet had a marked
Denis Nugara, Hardy M. Edwards
openaire +3 more sources
Poultry Science, 2016 The housing of laying hens is important for social, industrial, and regulatory aspects. Many studies have compared hen housing systems on the research farm, but few have fully examined commercial housing systems and management strategies.
Deana R. Jones +12 more
semanticscholar +1 more source
Organic egg production in Finland: management of animal welfare and food safety [PDF]
, 2005 A total of 20 out of 23 commercial organic layer farms (in excess of 80 % of all commercial Finnish organic farms year 2003) took part in the ongoing research, which identifies risk factors and potential solutions for laying hen welfare and food safety ...
Holma, U. +7 more
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