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Showing items 1 through 9 of 7.
  1. Library Resource
    Journal Articles & Books
    December, 2006

    Salinization of soils is a major impediment to their optimal utilization in many arid and semi-arid regions throughout the world. In several large irrigation schemes, salinity-induced land degradation has increased steadily over the last few decades with concurrent reductions in agricultural productivity and sustainability. Currently, saline soils occur within at least 100 countries. These soils need explicit approaches in their amelioration since soil salinization cannot be reduced by routine irrigation and crop management practices.

  2. Library Resource
    Journal Articles & Books
    December, 2006

    Weed problems continue to be an obstacle in plant protection and in natural areas, causing high costs of control and asking for adequate prevention measures. New weed problems in any given area (risk area) may arise from three basic sources: by introduction and naturalization of new weedy plant species, by increasing spread of weedy taxa that are already present in the risk area, and by the evolution of new weedy taxa in the risk area.

  3. Library Resource
    Journal Articles & Books
    December, 2006

    The increasing importance of sustainability in natural resource management is drawing increasing attention, worldwide, to the role that policies can play in enhancing the management and allocative efficiency of water. Looking at various examples from the literature, we discuss some best practices that have been applied in a variety of empirical settings, while highlighting some of the pitfalls to avoid. We discuss the role that assigning water rights can play in creating the necessary incentives for market-based mechanisms of re-allocation to work for water management.

  4. Library Resource
    Journal Articles & Books
    December, 2006

    Academics and policy-makers seeking to assess public perception and preferences of landscape face major challenges conceptually, methodologically and institutionally. The terms ‘landscape’, ‘public’ and ‘perception’ are contested and generate their own discourses and extensive literature. However, set within multi-disciplinary and interdisciplinary blends of natural and social scientificresearch, considerable progress has been made on all fronts. This paper seeks to untangle the complex array of conceptual and methodological frameworks that have evolved in landscape perception.

  5. Library Resource
    Journal Articles & Books
    December, 2006

    Despite great successes in crop research for the developing world, many poor farmers in marginal areas have not benefited. There is increasing recognition that crop research can and should benefit these farmers. This paper reviews some of the key technical issues related to the challenge of formulating and carrying out crop research that is targeted, relevant and appropriate to these farmers, with a particular emphasis on crop improvement. It examines the reasons that underpin the lack of research impacts, and some of the key challenges and tools available to make this happen.

  6. Library Resource
    Journal Articles & Books
    December, 2006
    India, Australia, Kenya, Africa, Eastern Africa

    The need to increase water productivity is a growing global concern as the World Commission on Water has estimated that demand for water will increase by c. 50% over the next 30 years and approximately half of the world's population will experience conditions of severe water stress by 2025. Three-quarters of African countries are expected to experience unstable water supplies, whereby small decreases in rainfall induce much larger reductions in streamflow.

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