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The samples of Eu2-xCexCuO4 (ECCO) with x = 0.09 (Eu1.91Ce0.09CuO4) and x = 0.16 (Eu1.84Ce0.16CuO4) have been synthesized by the solid reaction method without annealing. Each sample is covered with CuO to prevent excess oxygen entering the sample. The purity and electrical resistivity were investigated by x-ray Diffraction (XRD) and resistivity measurements. From the XRD analysis, it was found that the purity of ECCO phase was 93.5% with tetragonal structure of T’ for x = 0.09 while 96.1% for x = 0.16. These results show that the synthesis method with CuO covering has succeeded in synthesizing materials with high purity. From the electrical measurements, the trace of superconductors was not observed in all samples. It is probably the existence of excess oxygen, which was not fully absorbed by CuO Covering.

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Peatlands in the vast area of West Kalimantan can be utilized especially in Kubu Raya Regency is the Longan plantation. This study aims to determine soil fertility based on the physical and electrical properties of the soil. The parameters to be examined are specific gravity using ASTM method D-854-02 Pycnometer, EC value using conductivity meter, Cation Exchange Capacity (CEC) using Titrimetry/PU 3011 method, and C-Organic using Spectrophotometry method. Based on the results of the study it was found that the KL 1 sample had a specific gravity of 0.28 gcm-3 , a CEC of 28.61 me 100g-1 , and C-Organic of 42.14%. In the sample KL 2 has a specific gravity of 0.38 gcm-3 , CEC of 15.79 me 100g-1 , and C-Organic 14.16%. EC values have a range of 0.01-0.19 dSm-1. The results showed that the physical and electrical properties of the soil can be used to determine soil fertility.