Chapter 1 – The need for revision
3
is a growing need to address issues related to the capacity of the land to deliver services
– its multiple functions or benefits; not only to its production potential under specified
uses. The current Framework for land evaluation therefore needs to be updated to
reflect these newer concerns, some of which have been
the focus of international
conventions on climate change, biodiversity and desertification.
Related tools for participatory processes, such as the Guidelines for integrated
planning for sustainable management of land resources (FAO 1999a), reflect progress
made in recent years in addressing environmental and socio-economic issues. The
revised framework should promote the use in land evaluation of current knowledge
on
biodiversity, carbon sequestration, agricultural and environmental modelling,
agro-ecosystem analysis and stakeholder participation, including gender and land
tenure issues. The framework should also take into account recent developments in
assessment and monitoring of agro-environmental sustainability.
Another evolution causing increased pressure upon
land resources is the rapid
population growth in many developing countries. The total population in the least
developed countries was 361 million in 1976 and 685 million in 2001 (FAOSTAT 2003),
and is projected to rise to 1.7 billion by 2050 (medium variant, UN 2003), despite a
projected marked decline in fertility. While in the nineteen-fifties to the seventies, land
use planning often could still focus on currently little-used land, in the 21
st
century
there is generally strong competition between different uses of the land. Global
population growth and increased demands of diverse stakeholders
on land resources
are posing new challenges to land resources analysis. These include meeting the food
needs of a world population projected to exceed 7.5 billion by the year 2020; decreasing
the rate of land degradation and ameliorating degraded land; and protecting the quality
of land resources to safeguard their use by future generations.
It has been recognized that a number of development projects have failed through
ignorance of certain socio-economic
and cultural issues, such as land tenure, the
functioning of markets (Dessein 2002) or influence of institutions. Also political factors,
such as agricultural and environmental policies may have a strong influence on the way
in which the land is valued and used. It has become clear that top-down agricultural
modernization schemes generally have not worked, and
it is now well understood
that more participatory methods should be used in agricultural development. It can
be highly valuable to find out farmers’ own knowledge of their soils, and how these
respond to management (ethno-pedology).
The minimum decision area and hence, the map scale for a land evaluation should
depend on the envisaged level of planning and decision-making.
Different land
processes take place at different scales and may influence different levels of decision-
making. Integrated surveys therefore should produce a geo-referenced information
system with nested levels of detail, relevant to the identified levels of decision-making
(Gobin
et al., 2000).
In summary, there are two trends. First there is recognition of the
wider functions
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