Wood is currently goods that have high economic value and expensive. This is due to the decline in timber production from forests as a result of forest depletion and destruction in Indonesia.
On the other hand the need for wood for building materials is increasing along with the increase of population in Indonesia. Wood scarcity is a problem, but it can also be an opportunity. Wood is a renewable natural resource, so if farmers want to cultivate timber crops, of course, will improve their welfare.
The cultivation of katu-kayuan plants, especially in Java, has many obstacles. The availability of limited land is one of the main obstacles. The available land is more intensively used as agricultural land than as community forest land.
Agriculture is something that can not be left for some people in Java because it is the main livelihood. In order to cultivate timber plants it is necessary to use intercropping method that can combine between agricultural crops and timber plants on a land simultaneously.
The choice of species or species to be planted in the intercropping system is crucial to the success of the intercropping system. The Sengon tree (Paraserientes falcataria) is a type of forest plantation that is well known in the community and has a very high growth rate and a short cycle (6 8 years).
Sengon can grow optimally in altitude 400 -700 mdpl so it is suitable cultivated in the highlands. Sengon also has a small leaf type and a crown that is not dense so that the bottom plants are still quite exposed to sunlight. Because of the properties of the sengon, the sengon is suitable as a staple crop in the intercropping system. The types of suitable intercropping plants in the plant include corn, tubers, cassava, elephant grass, and various types of empon-empon.