Pastoralism is a livelihood strategy and a system of mobile livestock production that makes wide-ranging use of grazing lands in arid and semi-arid environment that doesn’t uphold sustainable crop cultivation. The freedom of mobility over outsized land for seasonal pastures is indispensable to pastoralist production primarily in order to convert the pastures residues into human food. The people and livestock in pastoral communities may move to avoid various natural and/or social hazards, to avert competition with others, or to seek more favourable conditions.
Land tenure is the relationship, whether legally or customarily defined, among people, as individuals or groups, with respect to land. (For convenience, "land" is used here to include other natural resources such as water and trees.) Land tenure is an institution, i.e., rules invented by societies to regulate behaviour. Rules of tenure define how property rights to land are to be allocated within societies. They define how access is granted to rights to use, control, and transfer land, as well as associated responsibilities and restraints. In simple terms, land tenure systems determine who can use what resources for how long, and under what conditions.
Land tenure is an important part of social, political and economic structures. It is multi-dimensional, bringing into play social, technical, economic, institutional, legal and political aspects that are often ignored but must be taken into account. Land tenure relationships may be well-defined and enforceable in a formal court of law or through customary structures in a community. Alternatively, they may be relatively poorly defined with ambiguities open to exploitation.