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| Kristiansen, P.; Merfield, C.. |
| The acquisition of food, textiles and other resources from plants and animals has been a major concern for human societies, from the earliest days as hunter-gathers, through pastoral and swidden phases, to agrarian societies, with an associated trend away from nomadic to sedentary lifestyles. Yet as agricultural production intensified and expanded, the negative effects on the underlying resource base have also increased. The history of environmental damage caused by agriculture is well documented; impacts include air pollution from greenhouse gases such as carbon dioxide, methane, nitrous oxide; land degradation as a result of clearing, cultivation of sloping land and salinity; water pollution from fertilisers, pesticides, overuse and wetland draining; and... |
| Tipo: Book chapter |
Palavras-chave: "Organics" in general. |
| Ano: 2006 |
URL: http://orgprints.org/14043/1/14043.pdf |
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| Kennedy, T.; Merfield, C.; Mahon, T.. |
| An organic rotation trial was established at Oak Park in 2000. The crop sequence in the seven year rotation was: two years grass-clover, winter wheat, potatoes, winter oats, lupins and spring barley. The grass-clover, which supplies nitrogen to the system, also provides vegetation which of late is cut and mixed with cereal straw to produce compost. The compost replaced sheep manure which was available up to 2007. Manure was applied to potato plots prior to cultivation for the period 2002 to 2007 and to barley plots from 2005 to 2007. The average yield of crops over the period of the rotation was: winter wheat 5.9 t/ha, potatoes 32.7 t/ha, winter oats 5.8 t/ha, lupins 2.4 t/ha and spring barley 4.5 t/ha. Triticale, which was grown in one of the plots... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Production systems Crop combinations and interactions Breeding; Genetics and propagation. |
| Ano: 2008 |
URL: http://orgprints.org/19851/1/T.KennedyOrgConf08.pdf |
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