Abstract

Mapping survey in order to classify, analyze and soil mapping by grouping at soils which have the same characteristics a certain mapping unit. The objective of this research is to mapping of K, Ca, and Mg of soils at people Palm oil estate of Hutabayu Raja, Simalungun District. This research was begun in Juni 2011 until Februari 2012. Soil nutrient data obtained through free sampling grid method. Mapping and classification using Geographic Information System with criteria nutrient status of BPPT (1983) and BPP Medan (2005). The result of research indicate that medium Potassium,very low Calcium and low Magnesium (0,3 Ha), medium Potassium, very low Calcium and very low Magnesium (204 Ha), high Potassium, very low Calcium and low Magnesium (5 Ha) and high Potassium, very low Calcium and very low Magnesium ( 90 Ha). Keywords : mapping survey, potassium, calcium, magnesium

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