Corn School: How late nitrogen impacts plants and yield

by

Corn growers often apply nitrogen later in the season to gain more control of the crop.

At the V10 or V11 development stage, growers typically have a better understanding of how the crop is developing, its yield potential, the growing environment and what the market is willing to pay. There’s also logistics to consider — a late-season N application window makes a lot of sense for many busy growers.

But are there risks when applying nitrogen at such a late stage of development? Could it burn leaves? Would the crop injury have a negative impact on yield?

On this episode of the RealAgriculture Corn School, host Bernard Tobin gets answers to those questions with help from University of Guelph researcher Josh Nasielski and graduate student Gavin Brady.

In 2023, Nasielski and Brady teamed up to test three nitrogen rates — 43, 65 and 130 lbs/ac — applied at V10 using UAN and urea at research sites in Elora, Ridgetown and Winchester, Ont.

The research, sponsored by NSERC Alliance, OMAFRA, University of Guelph, Grain Farmers of Ontario, Corteva and Agriculture and Agri-Food Canada looked at how both nitrogen source and application rate could impact injury and yield.

In the video below, Nasielski shares how UAN produced a higher percentage of both leaf burn and yield loss, compared to similar rates of urea. When both sources were applied V10 at 130 lbs/ac, UAN injury reduced yield by 17 per cent compared to eight per cent for urea.

Tap here for more Corn School episodes.

Wake up with RealAgriculture

Subscribe to our daily newsletters to keep you up-to-date with our latest coverage every morning.

Wake up with RealAgriculture

Other Episodes

Corn School (view all)Season 12 (2023) Episode 1
Episodes:

Please register to read and comment.

Privacy Preference Center

Necessary

Necessary cookies help make a website usable by enabling basic functions like page navigation and access to secure areas of the website. The website cannot function properly without these cookies.

gdpr, __cfduid, PHPSESSID, wordpress_test_cookie, woocommerce_items_in_cart, woocommerce_cart_hash, wp_woocommerce_session, wordpress_logged_in, wordpress_sec, wp-settings, wp-settings-time, __cf_mob_redir, wordpress_cache, realag
__cfduid

Marketing

Measuring interactions with the ads on the domain.

__gads,fsk_ut_2317
IDE

Statistics

These are used to track user interaction and detect potential problems. These help us improve our services by providing analytical data on how users use this site.

_ga,_gid,_gat,_cb,_chartbeat2,_chartbeat4
_ga,_gid
metrics_token

Preferences

Preference cookies enable the website to remember information that changes the way the website behaves or looks, like your preferred language or the region that you are in.

chartdefaults, comment_author, comment_author_email, comment_author_url
JSESSIONID, _os_session,anonymous_votes,csrf-param,csrf-token,user,user-id,user-platform,intercom-session,intercom-lou,intercom-session
personalization_id, tfw_exp

 

Register for a RealAgriculture account to manage your Shortcut menu instead of the default.

Register