Optimising Anatolian Black Pine (Pinus nigra) and Turkish Red Pine (Pinus brutia) Seedling Production in State Forest Nurseries of Turkey

Aim of study: In this study, Anatolian black pine (Pinus nigra) and Turkish red pine (Pinus brutia) seedling production at different ages were planned with linear programming method and maximizing the seedling revenues was aimed. Material and Methods: In this respect, according to the assumptions used in the model, fields in various sizes such as 10000 m2 area for one year old, 20000 m2 for two years old, 30000 m2 for three years old and 40000 m2 for four and five years old seedling were separated in the nursery. On the other hand, balanced seedling production in consecutive years and consideration of demand increase or decrease on the seedling production at any ages were main goals. For this, developed model was solved in three different formats deal with rapid demand increase (RDI), slow demand increase (SDI) and demand decrease (DD) scenarios. Main results: Obtained results showed that if there is a rapid increase in demand, largest present value was 385310 $ and total produced seedling number was 905262. Realization of slow demand increase has led to reduction of 6658 $ (1.73%) in present value, and 17461 piece in produced seedling number. However, reduction of demand decrease caused to occur present value 24989 $ (1.93%) and produced seedling number 61479 piece (6.79%) less. Research highlights: By controlling the seedling production amount and process, more effective usage of nursery area can be possible as well. By the way it can be possible to endure nursery costs and reach quality targets more efficiently.