... year (Plachter and Hampick 2010). The high N and P loads result in environmental pressures that are very costly to mitigate to Oba Pastoralism: Research, Policy and Practice 2011, 1:10 http://www.pastoralismjournal.com/content/1/1/10Page ... nutrient loads, and threatening to pollute watersources. Remedies are to be found in pricing policies, the legislation of water quality Oba Pastoralism: Research, Policy and Practice 2011, 1:10 http://www.pastoralismjournal.com/content/1/1/10Page ... Dijkman, J., Tarawali, S. and de Haan, C. Livestock in a changing landscape: Experiences and Regional perspectives (Volume 2). Pastoralism: Research, Policy and Practice 2011 1:10. Submit your manuscript...