Permanent Improvement
The Cyclopedic Law Dictionary · Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The Cyclopedic Law Dictionary
Permanent improvements are not necessarily everlasting in character, but are such as rest upon, or are attached to, the soil, are reasonably enduring and not intended for removal at the end of a limited term.
153 Iowa, 397.