land which, in its natural state, is not well suited for a particular purpose, such as raising crops
Land whose value is limited. The cost of making it capable of producing income is generally very close to the income it would produce.
Land whose value has been diminished due to some internal defect or external condition. In most cases, the cost to correct the flaw or condition is as much or more than the expected return from the property.
Forest Stewardship] Land that does not consistently produce a profitable crop because of infertility, drought, or other physical limitations such as shallow soils.
Property which is barely profitable to use.