The land study is acidic nature of the soil generally in tropical developing quite well and have high leaching process, which is a result of cation leaching out of the soil is alkaline. Then the hydrogen ions accumulate on the surface of soil particles also have a pH below 5.5, in particular KT1 2 3 may result in a reduction of phosphorus. Because phosphorus reacts steel and aluminum m. The melt out causing a compound soluble harder. Also, maybe there could be a pattern out, resulting in toxic to plants.