Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 10.
  1. Library Resource

    Sustainability

    Publication évaluée par des pairs
    janvier, 2015
    Australie

    The Australian National Soil Research, Development and Extension Strategy identifies soil security as a foundation for the current and future productivity and profitability of Australian agriculture. Current agricultural production is attenuated by soil degradation. Future production is highly dependent on the condition of Australian soils. Soil degradation in Australia is dominated in its areal extent by soil erosion. We reiterate the use of soil erosion as a reliable indicator of soil condition/quality and a practical measure of soil degradation.

  2. Library Resource
    Rapports et recherches
    juillet, 2014
    Brésil, Éthiopie, Nouvelle-Zélande, Afrique, Afrique orientale, Amérique centrale, Amérique du Sud, Océanie

    In the absence of clear international policy signals and strong global agreements on climate change and sustainable agriculture, countries are moving forward to test sustainability strategies through innovative policies and financing programmes. This paper explores how three countries – Brazil, Ethiopia, and New Zealand – are using integrated policy approaches to address the linked challenges of climate change, unsustainable agriculture, and food insecurity.

  3. Library Resource
    Articles et Livres
    décembre, 2014
    Australie

    Pasture rest is a possible strategy for improving land condition in the extensive grazing lands of northern Australia. If pastures currently in poor condition could be improved, then overall animal productivity and the sustainability of grazing could be increased. The scientific literature is examined to assess the strength of the experimental information to support and guide the use of pasture rest, and simulation modelling is undertaken to extend this information to a broader range of resting practices, growing conditions and initial pasture condition.

  4. Library Resource
    Articles et Livres
    décembre, 2014
    Australie

    NASA's Soil Moisture Active Passive (SMAP) mission will carry the first combined spaceborne L-band radiometer and Synthetic Aperture Radar (SAR) system with the objective of mapping near-surface soil moisture and freeze/thaw state globally every 2-3 days. SMAP will provide three soil moisture products: i) high-resolution from radar (~3 km), ii) low-resolution from radiometer (~36 km), and iii) intermediate-resolution from the fusion of radar and radiometer (~9 km).

  5. Library Resource
    Articles et Livres
    décembre, 2014
    Australie

    Understanding both the carbon dynamics within Australia’s northern savannas and the opportunities presented through diversification into carbon markets is of relevance to pastoral land managers both in Australia and globally. The Indigenous Land Corporation (ILC), through its role in assisting Indigenous people to acquire and manage land for cultural, social, environmental and economic benefits, has operated in the carbon market and is keen to continue working with its partners to explore the opportunities to develop and broaden this further.

  6. Library Resource
    Articles et Livres
    décembre, 2014
    Australie

    Beef cattle grazing is the dominant land use in the extensive tropical and sub-tropical rangelands of northern Australia. Despite the considerable knowledge on land and herd management gained from both research and practical experience, the adoption of improved management is limited by an inability to predict how changes in practices and combinations of practices will affect cattle production, economic returns and resource condition.

  7. Library Resource
    Articles et Livres
    décembre, 2014
    Australie

    Burning of savanna is a globally important source of greenhouse gas (GHG) emissions. In Australia, burning of savanna contributes between 2% and 4% annually of the nation’s reportable emissions. Complete removal of this source of emissions is unrealistic because fire is a ubiquitous natural process and important land-management tool. In the rangelands of northern Australia, fire is used to manage habitat for conservation, control woodland thickening, manipulate pastures for grazing and is an essential component of indigenous cultural and land-management practice.

  8. Library Resource
    Articles et Livres
    décembre, 2014
    Nouvelle-Zélande

    The impacts of domesticated herbivores on ecosystems that did not evolve with mammalian grazing can profoundly influence community composition and trophic interactions. Also, such impacts can occur over long time frames by altering successional vegetation trajectories. Removal of domesticated herbivores to protect native biota can therefore lead to unexpected consequences at multiple trophic levels for native and non-native species.

  9. Library Resource
    Articles et Livres
    décembre, 2014
    Australie

    Economic motivation for implementing targeted responses to rangeland degradation often lag the events that cause degradation and existing monitoring schemes often lack the sensitivity or the connections to ecological processes to reliably serve as a basis for evaluating success. In this paper, we present an approach for quantifying the relationship of economic output and land degradation during the intermediate stages of degradation. We also propose an approach that can provide enhanced incentives to implement proven responses before degradation processes are entrained.

  10. Library Resource
    Articles et Livres
    décembre, 2014
    Australie

    AIM: Improving our understanding of the drivers of forest fragmentation is fundamental to mitigating the consequences of anthropogenic fragmentation for biodiversity. Moreover, the impacts of fragmentation on biodiversity depend on the spatial scale at which fragmentation occurs. Therefore, understanding how the effect of land use on fragmentation patterns varies across scales is critical to ensure that fragmentation is managed at scales relevant to the ecology of target species or to land management.

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