The difficulty of restoring the environment caused former tin miners who are low nutrient reserves in addition to the microclimate of mined land is dry, water conditions mined (under) tend to be sour, so the plants will be difficult to live. This condition causes slow reclamation and rehabilitation of former tin mining land in the Islands Pacific Islands. Jatropha plants (Jatropha curcas) in technical culture has the potential to grow on various types of soil, among other resistant rocky, sandy, clay and even less fertile soil.
The research aims to obtain technical cultivation of Jatropha (Jatropha curcas) the best in the land reclamation of mined tin on the growth of new documented first.
The observations made on some of the treatment medium mixing tailings mined to improve the level of fertility. Initial observation was seen sand tailings fertility rate is very low, reflected from the ground masamnya reaction, low content of macro nutrients nitrogen, phosphorus, potassium, calcium and magnesium.
To correct this condition do pencampuran taling planting medium that will be used on the growth of Jatropha beginning. Some materials that can be used as ameliorant (pembenah) were attempted. Especially the materials are easily available, cheap and there are on site as well as environmentally friendly. One of the stages of research has tried out the soil top soil (garden soil top layer), compost.
The results show for the soil topsoil that is used has a higher acidity than the sand tailings. While the compost used has had realatif optimal acidity and nutrient content of compost is also better than the soil top soil. So the mixing of compost materials is evidently better than the top soil in Early Growth of Jatropha (Jatropha Curcas L.) in growing media the former tin mining.
Having attempted some level of comparison of the media obtained the best comparison of the tailings and compost 1:2 in Early Growth of Jatropha (Jatropha curcas L.) in growing media the former tin mining. Although compliance with a ratio of 1:1 remained the standard for three-month growth in the planting of seeds.
In addition to using organic ingredients mixing an effort to optimize the former tin mine tailings medium for initial growth of Jatropha also tested the use of inorganic fertilizers. Inorganic fertilizers are attempted is NPK.
From the results showed a dose of 2 grams of fertilizer is still sufficient for the growth of Jatropha seeds until the age of 3 months in Early Growth of Jatropha (Jatropha Curcas L.) in the planting medium tin mined by mixing the above media. Dose of 2 grams is the recommended dosage on the growth of normal conditions.
Fact also shows that the use of inorganic fertilizers can be saved by using more organic materials, and lack of nutrient deficiencies with organic materials can be covered with increased doses of inorganic fertilizers.
Research conducted also try a system or way of inorganic fertilizer. Fertilization in ways that have piloted the system was dissolved and the sown.
The results indicate fertilizer with sowing was more effective when compared to how dissolved in Early Growth of Jatropha (Jatropha curcas L.) in growing media the former tin mining.
The addition of materials pembenah (ameliorant) of land in the Jatropha nursery media (Jatropha curdas L.) in the planting medium should be addition to the former tin mining the optimal use of organic materials to improve tusktur, texture, biology, microclimate, good chemical reactions must also be capable of efficient fertilization an organic. Because although organic fertilizer has proved many long-term advantages in improving fertility, but still needed fertilizing prepared foods and used at the plants grow.
And from the fertile soil produced tetanaman productive with the permission of Allah, and from the barren ground is not generated except with difficulty.