Call for farmers to manage the environment sustainably – and for city dwellers to pay them for doing so
Date: 09 Nov 2005
This was the message from leading agricultural scientist, Dr John Williams, a former Chief of CSIRO Land and Water, who delivered the 2005 Farrer Memorial Oration last night at the University of Sydney.
In a speech titled 'Sustainable Agriculture in Australia - Some Ways Forward', Dr Williams said the agricultural community should not be expected to produce cheap, clean food and fibre, as well as provide a free service to maintain all the ecological functions of the landscape.
Dr Williams said the search for sustainable agriculture began in Australia with William Farrer, who in 1886 had suspected English wheat breeds were unsuitable because they were especially vulnerable to rust fungi.
He said Farrer's search for varieties more suited to Australian conditions began the "long journey that farmers and scientists have trodden for in the last 125 years".
"It is a demanding journey to build an agriculture that works for the climate and soils of the great south land", he said.
"Unfortunately farming based around annual crops and pastures does not work well in the Australian landscape."
The problem was that annual crops and pastures leak far too much water into the ground, leading to rising salt levels in valley floors, rivers and wetlands, soil acidification, soil nutrient depletion, and the delivery of increased nutrients to groundwater, streams and wetlands.
"The challenge is to build agro-ecosystems that generate wealth from food and fibre products and which have within them flows of water, nutrient and carbon that are well matched to the flows that can be accommodated in hydro-geochemical cycles of the ancient continent."
Dr Williams said there is sufficient knowledge now to shape the re-thinking of our farming systems.
However, to do so would require "radical change" to current land use. These changes should incorporate:
- Commercially driven tree production systems for large areas of the current crop and pasture zones,
- New farming systems made up of novel mixes of annual and perennial plants,
- New cereals, pulses, oilseed and forages able to substantially reduce deep drainage and nitrogen leakage, and
- New land assessment tools that best locate trees, other perennials, high-value annuals and native vegetation and match them to water targets and biodiversity goals.
- These tools should help identify land which should be farmed and those areas should be used to protect native biota.
Dr Williams said the future form of sustainable agriculture would be "a mosaic of new and old agricultural enterprises."
He added that ecosystem services are essential to urban societies and hence need to be recognised and paid for as a fundamental part of the economy.
"The agriculture of the future will be paid not only for the goods and services it produces, but will be renumerated for services delivered through its management of healthy landscapes, rivers, wetlands and estuaries.
"Agriculture will broaden its perspective to be seen as the custodian and manager of the life support systems for society as a whole", he said.
Dr Williams was also awarded the Farrer Memorial Medal by the Chairman of the Farrer Memorial Trust and Director-General of the NSW Department of Primary Industries, Mr Barry Buffier.
The medal is for distinguished services in agricultural science in Australia in the fields of research, education or administration.
Media inquiries: Joanne Finlay, Science Communication Specialist, NSW DPI on 6391 3171 or 0428 491 813.