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Abstract
So far, world food supply has managed to stay
ahead of rising population due to increasing
productivity and a modest expansion of cultivated
area. However, finite resource reserves, the
increasing cost of energy and the increasing
environmental cost of opening new land pose new
challenges. Africa is a special case where increased
food production has come mainly from
expansion of farmland, while low fertiliser use and
extensive soil mining have retarded productivity.
Recent limited public–private initiatives show
promise of reversing this low productivity. Global
food security depends on a focused effort to
increase production of food crops; in this effort
fertiliser must play an important part. Government
policy must be supportive of the provision of
purchasing power support for smallholder farmers
using such instruments as vouchers.
The production agronomic performance of current
fertiliser products is quite inefficient and must be
improved. New products using new resources
must be developed. Much of the nutrient content
of current fertiliser products is wasted at high cost
to the environment because only 30–40% is
absorbed by crops. This can be improved by
better application techniques and improved
products, and by improving crop attributes. There
is also ample scope for increased use of nutrientbearing
waste products. Nanotechnology and
biotechnology open new opportunities for collaborative
research between the public and private
sectors. For the world to be provided the next
generation of fertilisers, the private sector must
play a significant role — in partnership with public
institutions.