Increasing global population in the world is putting enormous pressure on available water resources and preservation of water quality. Therefore, sound policies with good incentives are needed to implement water conservation and pollution control practices, especially in areas of the world where major water bodies are already showing signs of degradation. To develop sustainable agricultural production practices, long-term studies were initiated in 1988 at Iowa State University to determine the effects of different tillage, crop rotation, and nutrient (fertilizer and manure) management systems on water use, crop yields, and nitrate–nitrogen (NO3-N) leaching losses to groundwater with the goal of mitigating environmental concerns of [...]
