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Soil erosion is the blow away of the of the top layer of the soil by various factors like wind, water...

soil conservation means conserving soil form being eroded (soil erosion) with some steps like
-afforestation
-check on over grazing
-building shelter belts
etc...

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soil is the most important renewable natural resource
The soil is a living system

Classification of soil:-
1.Black soil
2.red and yellow soil
3.alluvial soil
4.laterite soil
5.arid soil|
6.forest and mountain soil

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land is a natural resource of utmost importance, it acts as a base of universe.

in India land is divided under a variety of relief features as follows :-
plains-43%
mountains-30%
plateau-27%
3.28 mill.sq of land (Indian land)
and few parts of northeaster states are not yet being  surveyed.

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A point to be noted:-
1.Resources can contribute to development only when they are accompanied by appropriate technological development and institutional changes.

2.Irration consumption and over utilization of resources may lead to socio-economic and environmental problems , therefore we must conserve resources.

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It was conducted in June 1992, more than 100 heads of the states met for the first time in ,Rio de Janeiro.
this was held to address problems of environmental protection  and socioeconomic development at global level. under which they signed "Agenda 21" for achieving sustainable development .

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Planning is the widely accepted strategy for judicious use of resources

Need for resource planning:- there are some regions which can be considered as self sufficient in terms of the availability of resources and some regions which have acute shortage of few resources so, to maintain a balance ecologically we need "Resource planning".

resource planning includes 3 major steps:-
1.Identification of resources
2.planning a structure
3.Matching the resource development plans with national development plans

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1.On the basis of origin
2. On the basis exhaustibility
3. On the basis of ownership
4.On the basis of status of development

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everything available in our environment which can be used to satisfy our needs ,provided, it is technologically accessible, economically feasible and culturally acceptable and this is termed as "Resource".