This is a research paper. Please make sure that a vast majority of your paper speaks of the agricultural topic that you have chosen. Broader impact statements are useful for drawing in your readers, but make sure that you don’t dwell on them too long. You should reference journal articles. You should not reference websites like Wikipedia. Reputable websites like NASS, ERS, Census Bureau or manufacturers are allowable. You will end up with many references. The only sentences that you will not reference are statements that are general knowledge.