Press Release 01/59
International Conference on Conservation Agriculture
(Madrid, October 1-5)
FAO: CONVENTIONAL PLOUGHING ERODES THE SOIL -ZERO-TILLAGE IS AN
Madrid/Rome, 1 October - Intensive land cultivation methods using tractors
and ploughs are a major cause of severe soil loss and land degradation in
many developing countries, the UN Food and Agriculture Organization (FAO)
said in a statement today. Especially in warmer areas, where the topsoil
layer is thin, conventional tillage contributes to soil loss. Land degradation
also occurs in industrialized countries due to exaggerated mechanised tillage
using powerful heavy machines.
If farmers applied ecologically sound cultivation and the concept of
'Conservation Agriculture', millions of hectares of agricultural land could
be protected or saved from degradation and erosion, FAO said on the occasion
of the opening of the World Congress on Conservation Agriculture, taking
place in Madrid/Spain (October 1-5).
"The way soils are cultivated today needs to be changed," said FAO Assistant
Director-General Louise Fresco. "For agriculture to be sustainable, economically
attractive and socially acceptable, it must successfully exploit the productive
potential of those crop and animal genetic resources which are best adapted
to the local environment. This is achieved by effectively and efficiently
using available natural resources without depleting them."
Applying Conservation Agriculture means that farmers drastically reduce tillage
and keep a protective soil cover of leaves, stems and stalks from the previous
crop. This cover shields the soil surface from heat, wind and rain, keeps
the soils cooler and reduces moisture losses by evaporation. Less tillage
also means lower fuel and labour costs, and farmers need to spend less on
heavy machinery, FAO said. Crop rotation over several seasons is essential
to minimize the outbreak of pests and diseases.
Globally, conservation agriculture is currently being practised on about
58 million hectares of land, from the tropics almost to the Arctic Circle:
mostly in the United States (around 20 million ha), Brazil (13.5 million
ha), Argentina (9.5 million ha), Canada (4 million ha) and Paraguay (800,000
ha). The system has been adapted for grain crops and pulses, and also for
sugar cane, vegetables, potatoes, beets, cassava and fruits.
"The message that no-tillage reduces input costs, benefits soil quality and
reduces erosion and environmental pollution, is beginning to be embraced
by farmers worldwide," FAO said.
For the farmer, conservation farming is attractive because it reduces production
costs, time and labour. Soil tillage is among all farming activities the
single most energy consuming and air-polluting operation. By not tilling
the soil, farmers can save between 30 and 40 percent of time, labour and
fuel costs compared to conventional cropping. In mechanized systems, investment
and maintenance costs for machinery are lower in the long term.
In many areas it has been observed after some years of conservation farming,
that natural springs that had disappeared started to flow again, FAO said.
Water infiltrates easily on soils under conservation agriculture, increasing
the groundwater level, reducing surface runoff and thus soil erosion.
"Conservation Agriculture reaches yields comparable with modern intensive
agriculture but in a sustainable way," FAO stressed. "Yields tend to increase
over the years with yield variations decreasing."
Conservation agriculture is not organic farming, but both could be combined,
FAO emphazised. In Conservation Agriculture, farm chemicals, including fertilizer
and herbicides are carefully applied. Over the years, however, quantities
tend to decline.
FAO has been promoting conservation farming for more than 10 years, particularly
in Latin America where Conservation Agriculture has become a success story.
In Brazil's subtropical southern state of Santa Catarina, farmers in the
past relied heavily on mineral fertilizers, toxic pesticides and heavy machinery,
such as tractors, ploughs and harrows. They tended to grow the same crop
- usually maize - from one year to the next. Increasing erosion and declining
yields prompted a fresh look at soil management and a steady shift over the
past two decades to conservation agriculture, now being applied on 685,000
ha, or more than one-third of the state's total cropped area.
FAO is expanding the programme to other regions, such as Africa, Central
and South Asia. In the countries of the former Soviet Union, conventional
agriculture has led to environmental degradation through the use of unsuitable
and obsolete heavy farm machinery which urgently needs to be replaced.
For more information on the conference please contact the following
Or call Ms. Noelia OLMOS, ULLED ASOCIADOS, Phone: +34 915640496, email:
email@example.com or the FAO Media Relations
Office: 39-06-5705 2232/3259.
New video material on Conservation Agriculture in Brazil (13 minutes of B-roll,
including interviews with local farmers and an FAO expert) can be obtained
from the FAO Video Unit, Phone: 39-06-5705 2062/2518.
Audio-Clip - 'Conservation agriculture'
Mr. Martin Bwalya, a Zambian national, is the Regional Co-ordinator of the
African Conservation Tillage Network (ACT) based in Harare, Zimbabwe. He
attends the Madrid Conference. "African farmers need to get organized and
exchange information and experience with other continents to improve conservation
farming", he says.
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