ABSTRACT
In this study, biomass equations are presented for crimean pine (Pinus nigra Arnold) stands within the Zonguldak forest region. A total of 44 sample plots, each of 0.04 ha were chosen in order to define the biomass equations of black pine, the most common needle leaved species in Turkey. A tree which is the most similar to mean tree according to basal area was cut in each sample area as a sample tree. Various models were tested, utilizing the diameter (d) and the height (h) as independent variables and the most suitable models were determined. Using these models, above-ground biomass amounts can easily be acquired for single trees and stands.
ABSTRACT
Hazelnut plantations, which are a major source of income for the villagers in the eastern Black sea region are not able to provide sufficient income to the villagers due to price fluctuations and sudden falls witnessed in recent years. Alternative investments in place of hazelnut cultivation are being investigated in order to prevent migration to urban areas and to increase the welfare of the rural population in the region. Black alder plantation investments have been assessed as one of the most essential alternative investment tools within the framework of the study. Assessment was carried out by comparing expected possible net present values (NPV). Although value increase occurs 12-18 years later, more income can be obtained through black alder than hazelnut plantation. In hazelnut plantations, the best NPV emerged in the lower zone. NPV was positive in the moderate zone but values were close to zero. In upper zone, positive NPV couldn’t emerge. As a result, it was understood that black alder plantation investment is an effective alternative for hazelnut plantations.