"Agricultural research has greatly increased the yields of important staple food crops, and for many people this has meant more food availability and trade opportunities. Yet many people in rural areas in developing countries still live in abject poverty.

"Advocates of reforms in land rights and land markets frequently posit two important hypotheses: (1) African countries must grant land titles to farmers because titles increase land tenure security and facilitate access to input, land, and financial markets; and (2) land markets constitute the mo

Loss of biodiversity is the single most important threat to the conservation and sustainable use of drylands in northern Ethiopia due to many centuries of cultivation and heavy livestock grazing pressure.

The distribution and quality of soil and land resources in heterogeneous grazing lands of central Australia were changed by grazing. Sites located at increasing distances from livestock watering points showed greater degrees of landscape organization and soil productive potential.

Using data from previous studies, we tested two hypotheses about the impacts of grazing in a naturally heterogeneous landscape in arid central Australia: (1) that grazing leads to net change of resources at a paddock or landscape scale, and (2) that water and nutrients remain coupled as they move