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• Growth and yield patterns of black locust (Robinia pseudoacacia L.) sample trees affected by site conditions: case studies

  125-128

  Károly Rédei

  Fruzsina Szabó

  Veronika Honfy

  Tamás Ábri

  Views:

  236

  The trees removed from the long-term experiment plots are available for the measurements as lying trees. Through the determination of the volume in sections along the stem, the stem form, the stem volume and other factors can be specified. The comparison of the stems of individual trees of first and third yield classes of black locust (Robinia pseudoacacia L.) stands shows that site conditions have a main effect on the yield (mean tree volume). The difference can be as high as 53% at the age of 30 depending on the sites. To determine the growth patterns based on tree volume is rather a new approach in the light of the relevant literature. The obtained results also highlight the importance of choosing the appropriate tree species for a given site.

• Methodological basis of Black Locust (Robinia pseudoacacia L.) regeneration by coppicing: case studies

  15-22

  Zsolt Keserű

  Tamás Ábri

  Veronika Honfy

  Károly Rédei

  Views:

  1

  In countries struggling with timber shortage, including Hungary, fast-growing tree species such as black locust (Robinia pseudoacacia L.) offer the possibility of meeting an increasing proportion of timber demand from domestic sources through more efficient use of cultivation opportunities. Coppice forest management is the oldest, but also the simplest and, in most cases, the most cost-effective method of operation. In this paper, we present the timber production criteria for the coppice regeneration method, including the accelerated determination of the timber stock of black locust parent stands through case studies.

• Thinning and final cutting control in black locust (Robinia pseudoacacia L.) stands: a methodological approach – Short communication

  43-46

  Károly Rédei

  Veronika Honfy

  Tamás Ábri

  Views:

  138

  Planning, implementing and inspecting forestry operations require more extent application of certain assessment methods. These methods may need to be improved and, in some cases, their simplification is necessary in order to ease their usage in practice. Knowledge and application of auxiliary tables and functions, data on volume and methods to estimate yields are needed for the planning of any kind of forestry operations, depending on the level of planning. The main purpose of this paper is to propose relatively rapid and simple methods to estimate the volume at thinning and final cutting, and the gross above ground volume at the harvest of black locust (Robinia pseudoacacia L.) stands, as well as to introduce tending operation models tailored for black locust. All these measures could be beneficial to forest authorities and foresters who are responsible for planning and production.

• Simplified volume equations for grey poplar (Populus × canescens Smith.) standing trees

  27-31

  Tamás Ábri

  Veronika Honfy

  Károly Rédei

  Views:

  236

  Grey poplar (Populus× canescens Smith.) is a natural hybrid of white poplar (Populus alba L.) and Eurasian aspen (Populus tremula L.). It can be found throughout Europe, where both parents are present. The above mentioned species of poplars (under the term of ‘domestic poplars’) cover approximately 5% of the forests of Hungary. Of these species, grey poplar holds significance in forestry, and its role in afforestation shows a growing tendency. For this reason, improving the growing technology of grey poplar is a timely topic. In this paper we introduce algorithms which help estimate grey poplar tree volumes without having to use volume tables. Based on the performed evaluations, both equations can be used for single tree volume estimation with an error of less than 5%.