1. Affendy H, Tan MS, Assis K, Mohammad Amizi A (2013) Economic viability of Tectona grandis sole cropping and intercropping for 20 years planting project. Res J Agric For Sci 1(3):22–25
2. Bertomeu M, Roshetko JM, Rahayu S (2011) Optimum pruning strategies for reducing crop suppression in a gmelina-maize smallholder agroforestry system in claveria, philippines. Agrofor Syst 83:167–180
3. BPS Gunung Kidul (2007) Gunung kidul in numbers year 2007 (In Indonesian). Statistics Bureau in cooperation with District Development Planning Agency. Gunung Kidul. Wonosari
4. Djagbletey GD, Bredu SA (2007) Adoption of agroforestry by small scale teak farmers in Ghana-the case of nkoranza district. Ghana J For 20:1–13
5. Gittinger JP (1982) Economic analysis of agricultural projects, 2nd edn. John Hopkins University Press, Baltimore