Detemine whether the study depicts an observational study or an expotment A scientist ws studying the effects of a new lertilizer on crop yield She randomly ansigod hall of the plots on a lam to groe ane and the omar Iwo On the piots in group one, the new lertilizer was ued lor a year On the plots in group two, the od lortize yield for the plots in group one was comparod with the aveorage crop yield lor the plots in group two 109 used At the end of De yoar observational study experiment

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