Before appraisal assignments, it should be determined if the time schedule for right of way acquisition will allow harvesting of crops and nursery stock in the ground. If not, the appraiser should be instructed to consider the crops or nursery stock in the ground as improvements. If the factual situation changes during negotiation, and the appraisals and approved values do not reflect the true situation, they should be revised accordingly. Letters from the appraisers together with a ROW PD analysis and the proper recommended value forms may accomplish such changes.

When considering timberlands where marketable timber is grown for commercial purposes, the value of the timber should be established just as it is for any other improvements. Thus, a retention value may be established if the owner desires to retain the timber.

Orchard stock and cultivated trees should be treated as realty, and should not be valued separate and apart from the land but are to be valued insofar as they can be shown to contribute to the value of the land. Retention value may be ascribed to orchard stock and cultivated trees, assuming that they can be retained in a viable condition, economically feasible to the landowner.

Due to the specialized nature of appraising timber, orchard stock and cultivated trees it might be desirable for ROW PD to employ a technical expert for determining retention value.