Calophyllum trees and coconut trees have something in common, namely that they can grow well in coastal areas, all parts of the tree can be used and bear fruit throughout the year. With the length of the coastline of Indonesia reaching 99,093 km, it is very potential to develop these two plants. The calophyllum tree has non-edible oil but its productivity is almost the same as palm oil or crude palm oil (CPO), so it is very potential for biodiesel production. Whereas palm oil trees are the largest producer of vegetable oil. Why not biodiesel production from Jatropha ? For more detailed answers, read here. Meanwhile, coconut trees which are well known as multi-benefit plants are certainly very strategic and have the potential to be developed, especially now that the coconut tree population continues to decline due to the lack of replanting of old coconut plantations. Unlike the calophyllum tree, all the results are not food products, many processed coconut products are in the form of food products. The need for processed coconut food products continues to increase along with the increasing population. Issues of food and energy can also be overcome at the same time with these two plants.
The productivity of calophyllum is around 30 years, while coconut is longer, reaching around 80 years. Calophyllum tree wood has a high economic value as well as coconut trees. When the productive period of the two plants continues to produce fruit and when productivity decreases or stops, the wood becomes the ultimate product of high economic value. When compared to palm oil trees when their productive age runs out, the wood or trunk in general is still a problem, not even a few are just left in the plantation because it is not economical to process further, more details can be read here. Meanwhile, other forestry woods usually take decades before they can be harvested and there are no other products besides the wood. Of course, this is quite economically difficult and sometimes even not feasible.
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Calophyllum trees and coconut trees are also easy and inexpensive to care for, unlike palm oil trees which require a lot of water and fertilizer. Both also support agroforestry on the coast, as well as being a wind breaker. This encourages faster economic growth in coastal areas, and even becomes a tourist destination. Furthermore, for agroforestry systems, one of them can be distinguished based on its function, namely into a production function and a protection function. Production functions such as food production, feed, fuel such as biodiesel, fiber, wood and others. Meanwhile, protection functions such as prevention from damage to environmental resources as well as maintenance of production system such as hedges, water retention, fire prevention, soil and water conservation.
The choice of plant species is very important in making agroforestry patterns, because mistakes that occur will have a long and detrimental impact. Species that are suitable not only in terms of growth, economic value and adaptability to a particular environment, but also their ability to form an ideal growth structure when growing together with other species on the same land. The choice of this type is very dependent on the wishes of the land owner, the conditions of the place to grow, the economic value and the ease of cultivation.
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