How Does Fertilizer Increase Crop Yield? Fertilizers improve plant nutrition and help crops develop stronger root systems. For example, nitrogen-rich fertilizers promote greener, healthier leaves, while phosphorus aids in root and flower development. Depending on the crop and the soil, fertilizers can increase yields by up to 50% or more. https://farmisavy.blogspot.com/2024/10/Agricultural%20Yields%20and%20Profit.html