"The first cultivation method consisted of growing the vegetables on soil which had a low input of nutrients using animal manure and no pesticides except for one organically approved product on kale only.
The second method involved applying a low input of nutrients using animal manure, combined with use of pesticides, as much as allowed by regulation.
Finally, the third method comprised a combination of a high input of nutrients through mineral fertilisers and pesticides as legally allowed."
For over a period of two years, the produce from the three methods was then fed to animals, who were under observation for the intake and excretion of various minerals and trace elements. There was no conclusive evidence that proved that the organically grown produce contained more minerals or trace elements than the coventionally grown crops. For further information read the article published in Science Daily.