Land is defined as a system engaged in generating biological productivity. It is the earth’s infrastructure for life. The rate and quality of production generated from the land depends on its major components, soil and its fertility. Soil organic matter, derived from the vegetation supported by a particular soil, is the major component that controls soil fertility.

Twenty million people live in or near Indonesia' s natural forests. The country's humid tropical forests are primarily in Sumatra, Kalimantan, Sulawesi, and Irian Jaya. A devastating regional economic crisis that began in mid-1997 affected Indonesia more strongly than any other country in Asia. A random sample survey of 1050 households was conducted in six outer island provinces to understand the effects of the crisis on the well-being of forest villagers and on their agricultural and forest clearing practices.

The rate of forest clearing by small farmers in the humid forest zone (HFZ) of Cameroon increased significantly in a period of economic crisis dating from 1986. A random sample survey of 648 households was conducted in 54 villages in the HFZ to understand the effect of the crisis and of a 1996 currency devaluation on the practices of small farmers, and the effect of these practices on forest cover change.

Tamale is the capital city of Ghana’s Northern Region. As the regional capital, Tamale is growing rapidly – the population has almost tripled to over 370,000 in the past 30 years, and the areal extent has increased up to sevenfold in the same period. Urban agriculture is an integral part of the food system, linked to resource management and spatial planning. In general one can say that backyard farming flourishes, but more formally organised production is threatened by urbanisation.