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Urban soil management of marginalized lands: recognizant of history
Current Opinion in Environmental Sustainability ( IF 6.6 ) Pub Date : 2019-11-22 , DOI: 10.1016/j.cosust.2019.11.002
Nicolette Tamara Jonkman , Boris Jansen

Urban agriculture (UA) forms a crucial part of the urban food chain in many cities in sub-Sahara Africa (SSA). As urbanization continues, it becomes increasingly important to acknowledge the role of UA within the socioeconomic fabric of the city, and build inclusive business models to empower its practitioners. A crucial constraint for this is that various stakeholders in UA often take conflicting stances on the phenomenon. Some see it as an illegal, unsustainable practice leading to pollution and soil degradation. Others claim that it sustainably increases food security and offers employment opportunities, particularly for the urban poor. This leads to a conflict in perception and value sets between the various stakeholders involved in UA, which inhibits the further development of UA into a sustainable, more inclusive business. Recently we also see an emerging view that UA can help address the issue of climate change by sustainable management of soil carbon stocks in addition to providing food and other services. An element that is mostly ignored in the discussion surrounding UA is land-use history and its effect on composition and nutrient status of UA soils, and with it the potential for sustaining UA and mitigating climate change. We propose that the sustainability of UA can only be understood within the context of land-use practices during and before UA. Only by understanding and acknowledging this context can UA be part of inclusive business practices in the urban environment. Here we review scientific literature on UA sites in SSA to unravel the extent of the knowledge gap in this area, and derive a guiding framework to integrate land-use history effects in the discussion on UA within the context of developing inclusive business models for its practitioners.



中文翻译:

边缘化地区的城市土壤管理:历史的认可

在撒哈拉以南非洲(SSA)的许多城市中,城市农业(UA)构成了城市食物链的重要组成部分。随着城市化进程的继续,认识到UA在城市社会经济结构中的作用并建立包容性商业模式以增强从业人员的能力变得越来越重要。对此的一个关键约束是,UA中的各个利益相关者经常对此现象持矛盾态度。有些人将其视为导致污染和土壤退化的非法,不可持续的做法。其他人则声称,它可持续地增加粮食安全并提供就业机会,特别是对于城市贫民。这导致涉及UA的各个利益相关者之间在观念和价值观念上发生冲突,从而阻碍了UA进一步发展为可持续,更具包容性的业务。最近,我们还看到一种新的观点,即UA除了提供食物和其他服务外,还可以通过可持续管理土壤碳储量来帮助解决气候变化问题。在有关UA的讨论中,最容易被忽略的一个因素是土地使用历史及其对UA土壤组成和养分状况的影响,并具有维持UA和缓解气候变化的潜力。我们建议只能在UA期间和UA之前的土地使用实践的背景下了解UA的可持续性。只有了解并认可这种环境,UA才能成为城市环境中包容性商业实践的一部分。在这里,我们回顾了SSA UA网站上的科学文献,以揭示该领域知识差距的程度,

更新日期:2019-11-22
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