Sustainable use of sewage sludge as a source of nitrogen and phosphorus in cropping systems
Municipal sewage sludge is used as source of plant nutrients world wide for agriculture. However, many countries do not make full use of this opportunity. A lack of local knowledge about the benefits and disadvantages of sludge contributes to this low utilisation. For instance, only 28% of the sludg...
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2013
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| Online Access: | http://hdl.handle.net/2263/25298 Tesfamariam, EH 2009, Sustainable use of sewage sludge as a source of nitrogen and phosphorus in cropping systems, PhD thesis, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/25298 > http://upetd.up.ac.za/thesis/available/etd-06062010-154102/ |