Omplete a lab report using the scientific method

You will be observing the impact of mineral nitrogen fertilizer usage on maize crop yield. Which is measured in milligrams of dry mass harvested per 100 acres.(1 hectare)during a year period. both arable &nonarable land as experimental sites near Melle, Germany, where the yield of maize was observed from 1990-1998. the climate variations have also been carefully recorded on equally sized lots of both types of land.