Insecurity and Pastoral Development in the Sahel

In this article it is argued that conventional agro-ecological and organizational concepts used in pastoral development are strongly biased towards the formulation and enforcement of norms. This leads development experts to attempts to control pastoralists and their herds. The policies and development interventions based on these assumptions have been largely unsuccessful. As a consequence attention for dryland areas and pastoral development has declined among researchers and development agencies. An important reason for this failure is the fundamental misfit between these normative concepts and the reality of dryland ecosystems and pastoral society. In order to show this, an alternative view on rangeland ecology and pastoral society is presented, supported by a case study of Fulbe pastoral society in dryland Central Mali. The authors argue that approaches to pastoral development must be revised in the direction of the dynamics inherent in the pastoral way of life.     

统一与分裂:中国历史的启示

中国历史是一连绵不断的演进过程,国家统一、民族团结的内聚力不断增强。自春秋战国至清前期,虽曾经历了三次社会大分裂,但最终还是走向了秦汉、隋唐和元明清三次大统一。统一的时间越来越长,统一的规模越来越大,统一的制度基础越来越坚实。分裂的代价逐渐为人们所认识,统一的意义逐渐为人们所肯定。传统的古代社会,以战争方式谋求统一,几乎成为不二铁律。在当代世界,以和平方式谋求国家统一,成为人们更理性更睿智的选择,但这只是寻求国家统一方式的发展趋势,能否成为不二铁律尚待人类历史实践的检查。     

Water,Rules and Gender: Water Rights in an Indigenous Irrigation System,Marakwet, Kenya

The management of indigenous irrigation systems has received increasing attention both from social science researchers and from those development agents who seek to change them, or to find in them a model for organizing newly developed irrigation schemes. This article discusses how water is allocated within one such irrigation system, the hill furrow irrigation of the Marakwet escarpment in Kenya. It describes the ‘formal rules’ of water rights, giving particular attention to the issue of gender with respect to water rights. It then discusses the ‘working rules’ relevant to water allocation, involving various informal practices of sharing, buying and stealing. The implications of this complexity for understanding the operation of indigenous farmer-managed irrigation systems are examined.     

The Elmenteitan Obsidian Quarry (GsJj50): New Perspectives on Obsidian Access and Exchange During the Pastoral Neolithic in Southern Kenya

Early pastoralists in southern Kenya exploited obsidian sources to supply large regional exchange networks that persisted from c. 3200 to 1400 years ago. Obsidian exchange networks have been a source for speculation on the social and political nature of early pastoralism in eastern Africa. Herders who produced a discrete set of material culture called “Elmenteitan” mainly relied on a particular obsidian quarry site on the upper slopes of Ol Doinyo Opuru (Mt. Eburru), in the Central Rift Valley. These implications of the Elmenteitan pattern for herder social organization have not been systematically investigated. This paper reports on recent surveys and initial excavations at the Elmenteitan Obsidian Quarry (GsJj50) on Mt. Eburru as the central node of a prehistoric herder exchange network. Research revealed a series of stratified extraction and workshopping loci concentrated across a roughly 200-m² extent. Spatial, faunal, ceramic, and lithic datasets support communal resource access by small groups, rather than centralized control. This research has implications for interpreting the role of centralized quarries and resource nodes in the formation of mobile herder exchange and alliance. Networks were an important risk-reduction strategy in unpredictable environments and helped facilitate the spread of African pastoralism.     

绿色农业视角下青海特色农业发展路径及对策

绿色农业是二十一世纪农业发展的理想模式。青海独特的地域环境和资源条件形成了丰富的特色农业资源,也为发展绿色农业奠定了基础。文章通过对青海特色农业绿色化发展条件的分析,指出了特色农业的发展目标,并提出了实施路径及相关对策。     

Assessing Regional Crop Irrigation Requirements and Streamflow Availability for Irrigation Development in Saginaw Bay,Michigan

Spatial and temporal variability of soil, crop, and climate significantly affects the estimates of regional irrigation requirements. This paper incorporates soil association data and multiple-station, multiple-year climate data into four simulation models, CERES-MAIZE, SOYGRO, BEANGRO, and YIELD to account for the spatial and temporal variability of the input parameters in estimating the evapotranspiration rates and irrigation requirements of corn, drybean, soybean, and sugarbeet production in the Saginaw Bay basin, Michigan. The Thiessen method was used to delineate the spatial coverage of the weather stations in the study watershed. The results of the simulated crop irrigation requirements at the soil association level were multiplied by the weights of each soil association area to derive regional irrigation requirements. The availability of streamflow at different exceedence probabilities was evaluated to determine the maximum irrigation area the stream is able to sustain without causing water quality degradation. Through a case study of the Saginaw Bay irrigation development, this paper demonstrates that the spatial and temporal variability of soil, crop, and climate can be well represented in the simulation models to provide more realistic simulation results in support of irrigation decision making.     

Assessing Regional Crop Irrigation Requirements and Streamflow Availability for Irrigation Development in Saginaw Bay,Michigan

Spatial and temporal variability of soil, crop, and climate significantly affects the estimates of regional irrigation requirements. This paper incorporates soil association data and multiple-station, multiple-year climate data into four simulation models, CERES-MAIZE, SOYGRO, BEANGRO, and YIELD to account for the spatial and temporal variability of the input parameters in estimating the evapotranspiration rates and irrigation requirements of corn, drybean, soybean, and sugarbeet production in the Saginaw Bay basin, Michigan. The Thiessen method was used to delineate the spatial coverage of the weather stations in the study watershed. The results of the simulated crop irrigation requirements at the soil association level were multiplied by the weights of each soil association area to derive regional irrigation requirements. The availability of streamflow at different exceedence probabilities was evaluated to determine the maximum irrigation area the stream is able to sustain without causing water quality degradation. Through a case study of the Saginaw Bay irrigation development, this paper demonstrates that the spatial and temporal variability of soil, crop, and climate can be well represented in the simulation models to provide more realistic simulation results in support of irrigation decision making.     

关于发展海东地区现代特色农业的思考

加快现代特色农业的发展是农村经济发展的核心和关键。现代特色农业是海东农业和农村经济发展中最具竞争优势和发展潜力的产业。随着我国农业产业结构调整的不断深化,海东现代特色农业的发展必须立足区情,突出重点,实施农业结构战略性调整,大力培育独具特色的主导产业。     

From International to Global Development: New Geographies of 21st Century Development

Recent claims of 21^st century global convergence and the ‘rise of the South’ suggest a profound and ongoing redrawing of the global map of development and inequality. This article synthesizes shifting geographies of development across economic, social and environmental dimensions, and considers their implications for the ‘where’ of development. Some convergence in aggregate development indicators for the global North and South during this century challenge, now more than ever, the North–South binary underlying international development. Yet convergence claims do not adequately capture change in a world where development inequalities are profound. Between‐country inequalities remain vast, while within‐country inequalities are growing in many cases. Particular attention is given here to exploring the implications of such shifting geographies, and what those mean for the spatial nomenclature and reference of development. This article concludes by arguing for the need, now more than ever, to go beyond international development considered as rich North/poor South, and to move towards a more holistic global development — where the global South remains a key, although not exclusive, focus.     

Institutionalizing Participatory,Client-Driven Research and Technology Development in Agriculture

This article identifies key characteristics of participatory research and development(R&D) in the agricultural sector: it is client-driven, requires decentralized technology development, devolves to farmers the major responsibility for adaptive testing, and requires institutions and individuals to become accountable for the relevance and quality of technology on offer. Through case study material drawn from Latin America, Asia and Africa, the article then reviews ways by which institutions have responded to these characteristics and raises issues for further elaboration. Steps need to be taken, in particular, to safeguard equity, both between the more and less vocal groups of farmers, and between the requirements of present and future generations (the latter referring particularly to environmental concerns). It is argued that participatory R&D alone is insufficient to deliver innovations relevant to diverse client groups: policy mechanisms are required to define which clients are to participate, whose agendas are to drive the process, and what organizational innovations are needed to move agricultural R&D in these directions.     

From Core-periphery to Polycentric Development: Concepts of Spatial and Aspatial Peripherality

Technical changes in the field of transport, communication and information technology, together with long-term structural shifts will, in the new century, allow a degree of spatial reorganization of European economic activity. The validity of conventional (spatial) models of peripherality is increasingly questionable. They should be supplemented by more appropriate 'aspatial' concepts. Although many elements of these are already well understood, coherent models and operational indicators are required. These could provide a sound theoretical basis on which to further the European Spatial Development Perspective's polycentric development objective. They could also provide new opportunities for peripheral regions, and relief from 'overheating' at the core.