The 4R nutrient management system – using the right nutrient source at the right rate, right time, and right place to meet the crop’s needs – is well known as a system to help increase farm profitability, reduce the risk of environmental impacts, and improve sustainability.
However, Ontario’s 4R recommendations were developed for cropping systems in which only chemical fertilizers are used. What about 4R practices for fertilizers applied to manured cropping systems? Read more..