SPECTROPHOTOMETRIC DETERMINATION OF Fe II IN AGRICULTURE SOIL FOR TOMATOES CROP

In the present study the aim was to determine the Fe II content in soil samples taken from the greenhouse of a tomato crop (from Oradea Town -NW Romania). The method used was a spectrophotometric determination in the visible range using 1.10 phenanthroline as a color reagent at a wavelength of 510 nm. The soil under study proved to be a sandy soil, with a rather low content of Iron II (0.7941 mg of Fe2+ / 1 kg of soil) with a slightly acidic pH, soil which from these points of view is suitable for tomatoes cultivation.