Closing nutrient cycles by reusing sewage water in Jordan
2002
Goewie, E.A. | Duqqah, M.M.
Using treated sewage water on farms in Jordan could close nutrient cycles. Nation_s agricultural policy making should therefore address four demands that makes the safe use of artificial fertilisers possible. Firstly, farmers will become less dependent on chemical fertilisers by teaching them how to increase fertiliser efficiency. Manuring advices should be based on calculations of farm-bound nitrogen flows supported by the N-Dicea model. Secondly, farmers must be informed about nutrient contents of their irrigation water. Water sanitation engineers should provide them such information before production'season'starts and farmers must be able to control that information for their own farm situation. Thirdly, carbon/nitrogen ratios of farmland must be enhanced. Organic matter, soil coverage and crop rotation must be used as tools to improve the buffering capacities of the land under production. Fourthly, farmers, researchers, extensionists and policymakers must learn to work together. They must learn to concert knowledge for the sake of Jordan_s agricultural policy striving for safe and sustainable forms of land use. The result will be that national research and extension agendas become more relevant for the real solving of problems among farmers
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