The multiyear On-Field Ohio project has developed a revised Ohio Phosphorus Risk Index that will help farmers calculate the risk of agricultural phosphorus runoff reaching waterways. The On-Field Ohio project collected data on more than 2,000 runoff events from 29 farm fields. Some of the management practices that were evaluated included tillage, soil type, fertilizer placement, soil phosphorus content, field topography, soil infiltration rate, and cover crops. Different crop-management scenarios were input into the index so that farmers can compare scenarios and make informed decisions about how to prioritize time and resources.
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