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

Abstract

In this study, Turkish red pine and Anatolian black pine seedling production at different ages were planned with linear programming method and maximizing the seedling revenues was aimed. In this respect, according to the assumptions used in the model, fields in various sizes such as 10000 m 2 area for one year old, 20000 m 2 for two years old, 30000 m 2 for three years old and 40000 m 2 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. 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.