Richard Mulvaney says the use of synthetic nitrogen for modern cereal production is assumed to build soil organic matter by increasing the input of residue carbon. However, the University of Illinois fertility specialist says this assumption is at odds with declining levels of soil carbon and nitrogen documented in long-term cropping trials. He adds these declines in soil nitrogen and carbon are occurring even when fertilizer inputs exceed grain nitrogen removal.
Mulvaney will share what efforts need to be made to better match fertilizer usage to the crop’s demand for nitrogen. He will outline how a transition toward agricultural diversification may be needed, with greater use of legume rotations to reduce the need for synthetic nitrogen.
(Total Run Time: 54 Minutes. File Size: 52MB)
Free PDF of Slides
Click to view (user account required) a PDF version of this presentation to follow along while listening to your purchased audio file. (No purchase necessary for slides but you must be logged in as a web site registered user to access.)
Special Discount to 2015 NNTC Attendees
Attendees of the 2015 National No-Tillage Conference should e-mail or call Sue Ramstack at email@example.com or (800) 645-8455, x407, to receive a special offer code that allows you to purchase each individual audio file for just $4.95. Sue will confirm that you attended the event before providing you the offer code.
Accessing Your Downloadable Products
After check out you will get a response page. It will contain the link to your purchased audio file. Your confirmation message sent by email will also contain the link to the file.
Web site registered users have the benefit of order history. Store transactions are kept in your account's order history. The link to the download and a record of your purchase is kept in your account profile for future access. Login and click "MY ACCOUNT" from top bar on right and click "Order History."
Receive Audio Files On CD By Mail
If you would prefer to receive audio files on CD, please call Sue Ramstack at (800) 645-8455, x407, with the audio files you would like to purchase. Please note that there will be a charge of $5.95 for shipping.