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Maximum N applications should not exceed 140 lbs. of Exactrix N per acre
 

• Maximum N applications should not exceed 140 lbs. of Exactrix N per acre in total of as Ammonium or NH4 and including NH4 in liquid products APP,ATS.
   
• Economic inputs are not as efficient, Yield reductions occur above 140 total lbs. of N as NH4 per acre.
   
• This Exactrix Rule is not observable or applicable to pressure reducing NH3 systems or solution 32 systems due a lack of a 1%CV Uniformity of application and Band Streaming flows.
   
• Applications were up to 52 lbs N per acre NH4 or well above 140 total pounds of N.
   
• Yield loss is estimated at 9 to 15 bushels per acre from over application.
   
• The back side of the yield curve is seldom of concern to fertilizer dealers commonly called insurance.
   
• There is limit to a good thing and with Exactrix Ammonia applied at 1%CV of application TAPPS that limit is now well understood.
   
• Remember yields come up fast with TAPPS and TAPPKTS plus Zinc and Mn. See Chart 2 and 3.
   
• The Yield curve peaks at 140 pounds total N and then tapers down fast as shown in Chart 3.

 
Your Great Plains Reporter

     Guy J Swanson
Exactrix® Global Systems
4501 East Trent Avenue
Spokane, Washington.
99212
509-254-6854 office.
509-995-1879 cell.
exactrix@exactrix.com
 

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