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 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 and extension specialist in the Department of Agronomy 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 12 pm CDT on June 9:
Click this URL, or type this web address into your internet browser: https://iastate.zoom.us/j/364284172
Or, go to https://iastate.zoom.us/join and enter meeting ID: 364 284 172
Or, join from a dial-in phone line:
Dial: +1 312 626 6799 or +1 646 876 9923
Meeting ID: 364 284 172
The webinar will also be recorded and archived on the ILF website, so that it can be watched at any time. Archived webinars are available at https://www.iowalearningfarms.org/page/webinars.
A Certified Crop Adviser board-approved continuing education unit (CEU) has been applied for, for those who are able to participate in the live webinar. Information about how to apply to receive the credit will be provided at the end of the live webinar.