[Organic matter and mineral soil treatment to tailing materials on availability of macronutrient and micro metal elements]
1997
Suryanto (Universitas Gadjah Mada, Yogyakarta (Indonesia). Fakultas Pertanian) | Susetyo, W.
A laboratory experiment was conducted to improve the chemical properties of a tailing material. In this experiment tailing materials were treated with an organic matter and a mineral soil. The tailing material was collected from a copper minning site of Freeport Indonesia Company, Timika (Irian Jaya), while chicken manure and latosol were from Semarang (Central Java). The chemical problems of the tailing material are low cation exchange (CEC), very low content of organic and inorganic colloids, and high content of metal element. The addition of the chicken manure or the mineral soil was at 0, 5, 10 and 15 percent. The result showed that the added materials could improve the chemical properties of the tailing material. They increased its CEC, available nitrogen, phosphorous, potassium, and calcium and decreased significantly its available metal elements, i.e, iron, mangan, zinc, and copper. The addition of chicken manure at the rate of 5 and 10 percent into the tailing material resulting in better growth of maize however, at the rate of 15 percent the growth was inhibited. The maize plant grew better in the tailing material added with latosol at all investigated rate. The growth was increased with the increasing of the latosol addition rate
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