In New Zealand the Resource Management Act 1991 has put standards in place regarding surface and ground water quality. Nitrogen leaching from dairy effluent compromises these standards; consequently the nation-wide aim is to have all dairy farms operating land-based effluent disposal. An...

The livestock revolution that has occurred over the last few decades has seen a phenomenal increase in demand for livestock products in much of the developing world. This has largely been matched with growth in supplies, driven by government policies, and increased animal numbers and...