The world’s farmers must quickly switch to more sustainable and productive farming systems to grow the food needed by a swelling world population and respond to climate change, FAO’s top crops expert told an international farm congress Feb. 4.
In a keynote speech to 1,000 participants at the IVth World Congress on Conservation Agriculture (CA) in New Delhi, Shivaji Pandey, director of FAO’s Plant Production and Protection Division, endorsed CA as an essential part of that change.
“The world has no alternative to pursuing sustainable crop production intensification to meet the growing food and feed demand, to alleviate poverty and to protect its natural resources. Conservation agriculture is an essential element of that intensification,” Pandey said.
Conservation agriculture is a farming system that does away with regular plowing and tillage and promotes permanent soil cover and diversified crops rotation to ensure optimal soil health and productivity. Introduced some 25 years ago, it is now practised on 247 million acres of land across the world.
Conventional intensive farming methods had often contributed to environmental damage, resulting in declining rates of agricultural productivity just as the world needs to double its food production to feed nine billion people by 2050, Pandey said.
“In the name of intensification in many places around the world, farmers overplowed, overfertilized, overirrigated, overapplied pesticides,” he said. “But in so doing we also affected all aspects of the soil, water, land, biodiversity and the services provided by an intact ecosystem. That began to bring yield growth rates down.”
On current trends, the rate of growth in agricultural productivity is expected to fall to 1.5 per cent between now and 2030 and further to 0.9 per cent between 2030 and 2050, compared with 2.3 per cent per year since 1961.
In developing countries, growth in wheat yields has gone down from about five per cent in 1980 to two per cent in 2005. Growth in rice yields went down from 3.2 per cent to 1.2 per cent during the same period while maize yields dropped from 3.1 per cent to one per cent.
Conservation agriculture could not only help bring yields back up but also deliver several important environmental benefits, Pandey continued. Aside from restoring soil health, it also saved on energy use in agriculture, reducing the footprint of a sector which currently accounts for some 30 per cent of global greenhouse gas emissions.
It could further mitigate climate change by helping sequester carbon in the soil and also potentially save 42,378 cubic feet of water a year by 2030 since healthy soil retains more moisture and needs less irrigation.
Only with sustainable intensification of crop production can serious progress be made towards achieving the Millennium Development Goals on hunger and poverty reduction and on ensuring environmental sustainability, Pandey warned. “We are currently headed in the wrong direction for both of them,” he added.
He urged governments, donors and other stakeholders to provide policy and financial support to ensure early, wider uptake of CA. Training, participatory research and building strong farmers’ organizations should be accelerated while newly developed CA equipment should be made widely available and/or manufactured locally.