Phosphorus Loss from Surface Runoff Is Focus of Webinar

Iowa Learning Farms to hold webinar June 9

June 2, 2021, 10:32 am | Hilary Pierce

Antonio Mallarino.AMES, Iowa – Phosphorus loss with surface runoff from corn and soybean fields will be the topic of the Iowa Learning Farms webinar at noon on Wednesday, June 9.

Research from Iowa State University Extension and Outreach has demonstrated that no-tillage and cover crops are very effective conservation practices to reduce soil erosion and sediment-bound phosphorus (P) loss from agricultural fields. However, research in other states has shown that these practices may not reduce and may even increase loss of dissolved P with surface runoff compared with tillage or no use of cover crops.

Although dissolved P is often a minor proportion of the total P in runoff when compared to the sediment-bound P fraction, it is the most effective P fraction at causing water quality impairment. Antonio Mallarino, professor in agronomy and extension specialist at Iowa State University, will share Iowa field research results that evaluated the effects of these management practices on soil, total P and dissolved P with surface runoff.

Mallarino’s research focuses on soil fertility, nutrient management and impacts of management practices on phosphorus loss from crop fields and water quality.

Webinar Access Instructions

To participate in the live webinar, shortly before noon on June 9:

A Certified Crop Adviser board-approved continuing education unit has been applied for, for those who are able to participate in the live webinar. Information about how to apply to receive the CEU will be provided at the end of the live webinar.

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