Plants are the basis for sustainable green growth, and the value of existence and importance of trees including landscape trees can’t be emphasized enough. Therefore, they are precious living things thriving in all sorts of public services, and continuous civil complaints for justifiable compensation of landscape trees are filed.
Therefore, the study figures out appraisal methods necessary for compensation for loss appraisal process and lawsuit appraisal of landscape trees, and surveys a group of experts on methods of compensation for loss of landscape trees. Also, the study proposes a standardized formula for normal planting intervals based on target specifications of produced landscape trees.
Based on these, a new classification system of appraisal method due to reclassification of landscape trees added to public services shall be established, and has its purpose in gaining a foothold of realistic compensation system due to environmental changes of the times by proposing appraisal standards, and the results are shown below.

First, by analyzing terminology usage present in the current landscape tree appraisal, the term landscape tree is more widely used in the market than ornamental trees which is used in the law, and revision is necessary.
According to 「Public Service Legislation」, the classification standard of trees (produced landscape trees) intended for sales is ambiguous, the classification standard for medium sized trees and seedlings is abstract, reasonable evaluation methods of landscape trees does not exist, and standards of planting trees do not really exist. Also, reestablishment of significant terminology concept is necessary since the concept for the price of withering plants is uncertain, price concept of proper material has not been proposed, and criteria for withering rate is imperfect.
As a result, compensation varies depending on the interpretation of landscape tree appraisers, and a universal and reasonable terminology establishment is urgent, and it is thought to be appropriate to classify seedlings by seedling raising stage, growth period, and product stage.

Second, results of analyzing legislation cases related to landscape trees: growing trees of forest land are materials, and apply age of final cutting when reaching harvest, and apply cost of sales loss when they have not reached harvest. Fruit trees are profitable plants with the purpose of producing fruits, and shall be considered as landscape trees if they do not meet economic production goals. When the landscape trees are adult trees, and if they are in a higher density than standard planting intervals, cost of sales loss shall be applied considering time required for commercialization.

Third, results of Delphi analysis related to appraisal improvement plan: tree producers are shown to apply and classify appraisal methods using subdivided produced landscape trees (produced landscape trees available for commercialization, landscape trees which have not approached the stage of commercialization, landscape trees in sowing or germination). On the other hand, shrub producers prefer evaluation by planting intervals according to target standard sizes, and appraisers claim that distinct appraisal regulations are necessary as different species have different planting purposes.

Fourth, the standard formula of planting intervals according to production target specifications is calculated using root-collar caliper and diameter at breast height, and apply ① standard medium sized trees which have not yet reached commercialization [deciduous tree production goal (R(B) less than 6cm]= (target standard)= [target standard R(㎝)× 15 × 0.7]. ② In case of commercialization (R6～R10)= [target standard R(㎝) × 15 ± 5%], ③ In case of more than R12= [target standard R(㎝) × 15 × 130%] shall be applied. In case of using diameter at breast height ④ In case of commercialization(B6～B10)= [target standard B(㎝) × 20 × 15±5%], ⑤ In case of more than B12= [target standard B(㎝) × 20 × 130%] shall be applied.
The formula deduced in order to calculate estimated planting intervals for production goal standards is expect to easily and conveniently apply to the work by target standards when appraisals take place considering planting environment and plant types which is similar to the result of the actual approval standard.

Fifth, appraisal methods based on tree classification of compensation for loss are classified according to planted locations. ① landscape trees within a house=[price of arrival at the site + planting cost], ② landscape trees in places such as arboretum=[ management technology of tress + relocation expenses considering scarcity of the trees ③ landscape trees in a place of loads= [landscape tree production cost + work out added price. In case of producted landscape threes ④ landscape trees ready to be commercialized as sales loss, ⑤ and landscape trees not ready to be commercialized shall be calculated by reducing current price of the future investment cost and invested price till commercialization from expected gross income of the target standard. ⑥Landscape trees in sowing and germination stage will be calculated using the current price of the cost used until the point of time for price.

Sixth, prearranged plans and preparations must be done thoroughly in order for the act of making a living to continue in the relocated place and minimize the loss of acceptance by having justifiable production to occur with justifiable compensation for the subjects of acceptance among all considerations of landscape tree appraisals.

The appraiser shall precisely figure out opinions of the subjects of acceptance for justifiable acts of farming and continuous acts of making a living as to make a fair evaluations. Also, the appraiser’s own regulations shall be abided by, but there is a responsibility to deduce a fair and impartial evaluation among acceptor and subjects of acceptance.
Acceptor including the nation, local government, and government-invested institutions shall revise the law to be more detailed and subdivided which accords with the acceptance for the compensation of landscape trees of 「Public Service Legislation」. Especially when accepting land for public purposes, prearranged plan shall be made to make justifiable compensations, and detailed and subdivided approach focusing on the field is requested from the budget establishment process.

As mentioned above, future public service’s efficient progress and justifiable compensations of production farms are hoped to be made based on the study results related to improvements of appraisal methods of landscape tree’s compensation for loss. However, producer’s cultivation methods and environments have not been considered since research subjects were limited to partial production farms and appraisers. Also, a lot of controversy is expected regarding the point of view of the appraisers depending on expert experience and knowledge. Continuous further studies are necessary since research period was temporary, and discussions of landscape trees’ quality and opinions of related organizations and research institution have not been collected.