OK, the time has come
I was really busy with college and everything so I allmost forgot to post the circuit. But here it is.
As Magician said this circuit is too sensitive to measure EF under a power line (35kV). So I connected the antenna directly to analog input pin and got the results, I tried 100pF and some other value of capacitors but the readings were "strange", no capacitor it is
And here are the results:
Directly under the wires from first to the second pillar:
At the pillar, perpendicular to the wires:
Once again thanks for all your help!