Invasive species cause significant losses through their effect on agriculture, human health and the environment. Their importance has increased with time owing to globalisation, as the spread of invasive species is facilitated by the increased movement of people, cargo and genetic material...

Agroforestry projects have the potential to help mitigate global warming by acting as sinks for greenhouse gasses. However, participation in carbon-sink projects may be constrained by high costs. This problem may be particularly severe for projects involving smallholders in developing countries....

Growing trees with crops has environmental and economic implications. Trees can help prevent landdegradation and increase biodiversity while at the same time allow for the continued use of the land toproduce agricultural crops. In fact, growing trees alongside crops is known to improve both the...

Agroforestry can help in the battle to control global warming by sequestering atmospheric CO2. Most attention so far has been on the carbon sequestered in trees, but soils can also contain considerable amounts of carbon, some of which is released upon harvest. There has been little...

Selection of cattle with greater feed efficiency is known to be profitable. Savings in southern Australian beef production systems of $6.55 per breeding cow per year have been estimated for selection for lower residual feed intake (RFI), and an additional saving of $4.34 per breeding cow per...

The detectability of invasive organisms influences the feasibility of eradicating an infestation. Search theory offers a framework for defining and measuring detectability, taking account of searcher ability, biological factors and the search environment. In this paper, search theory concepts...