I have no guide line about soil testing . my requirement is to know the actual concentration of soil for testing Electrical conductivity of soil.

i got the following result .

2gm soil / 100ml= EC 167 micro simens

4gm soil / 100ml= EC 296 micro simens

6gm soil / 100ml= EC 464 micro simens

8gm soil / 100ml= EC 621 micro simens

10gm soil / 100ml= EC 716 micro simens

My question is what is requirement amount of soil for testing EC ?.

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