When partially degraded semi-productive land is converted to
exclosures, though the net benefits are very low in the initial periods,
the overall NPV is still positive and large (NPV=ETB 3031/ha). However,
converting productive crop land to forests results in a negative
net present value (NPV=ETB −2135/ha). It is thus uneconomical
to introduce land use change from productive crop lands to forest
land.