Corn School: Don't get knocked out by fertilizer burn

Episodes:

Starter fertilizer can give a corn crop some early-season punch, but if you’re not careful with application rates those new plants could get knocked out by fertilizer burn.

Banding fertilizer in a 2-by-2 band beside the seed promotes early growth and vigour but too much nutrient too close to the seed can injure roots and lead to poor developing and variable stands, says Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA) corn lead Ben Rosser.

On this episode of the RealAgriculture Corn School, we catch up with Rosser at the recent FarmSmart Expo at OMAFRA’s Elora, Ont. research station where he offers tips on diagnosing fertilizer burn in a corn crop.

The first red flag is stand variability. Uneven plants and bare spots where seeds have not emerged means there is trouble under ground. Rosser advises growers to dig up the smaller laggard plants and look for tell-tale signs of fertilizer burn. On injured plants, growers will typically notice that seed roots are missing or shorter than they should be. Another clue is black or brown root tips indicating the roots have died because of fertilizer burn. (Story continues after the video.)

When it comes to starter fertilizer, Rosser says it’s best for growers to play it safe. OMAFRA’s guidelines for normal growing conditions are as follows: When using urea-based fertilizer in a 2-by-2 band on 30-inch corn rows, no more than 36 pounds of N per acre (or 71 lb of N + K20 + S). When using non-urea-based fertilizer, no more than 47 pounds of N per acre (or 105 lb of N + K20 + S).

Click here for more Corn School episodes.

Leave a Reply

 

This site uses Akismet to reduce spam. Learn how your comment data is processed.

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
__cfduid

Marketing

Measuring interactions with the ads on the domain.

__gads,fsk_ut_2317
scmtid,v,a,JSESSIONID
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,_gat
_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