MO Ag Experiment StationCollege of Agriculture, Food and Natural Resources
Plant Food Control Service

Ag Lime


Special Note


Soil Test Interpretations and Recommendations

Fertilizer & Ag Lime Advisory Councils


Financial Report

Semi-annual Report Forms
* Ag Lime
* Fertilizer
--July 1 - December 31, 2018

Contact us
Theresa Wybrant
Compliance Manager
University of Missouri
Columbia, MO 65211-8080
(573) 882-3891 or
(573) 882-4891
Fax: (573) 882=4543


Notice of Open Meeting on February 20, 2019: HERE.

The Missouri Fertilizer Control Board (MoFCB) exercises general supervision of the administration and enforcement of the Missouri Fertilizer Law. Members of the MoFCB can be found HERE.

Fertilizer/Ag Lime Control Service carries out the day-to-day administration of the Missouri Fertilizer and Ag Liming Materials Laws and Rules. With responsibility for the Fertilizer law since 1893 and Ag Liming Materials Law since 1976, these activities are assigned to us by the Director of the Missouri Agricultural Experiment Station and include all the provisions included in the sections describing the Powers of the Director with the exception of making analyses. Our offices are currently located at 3600 E. New Haven Road on South Farm in Columbia. Our field inspection staff of eight who works out of their home's within their assigned territory, administers the field components of the laws. The office portion is accomplished by one manager, one auditor, one administrative assistant and one office support staff III type person.

It is our goal to emphasize the "Service" portion of our department name. So, if we can be of further service, please do not hesitate to call, write or contact us by e-mail.

Fertilizer investigational allowances are 10 % or two units for all primary nutrients or 3% relative value. Relative value (RV) is calculated:

RV = 

    (Found((Nitrogen X 2)+(Available Phosphate X 2)+Soluble Potash))
------------------------------------------------------------------------   X  100
 (Guaranteed((Nitrogen X 2)+(Available Phosphate X 2)+Soluble Potash))

Ag Liming Material investigational allowances are 90 % passing a U.S. #8 sieve and calcium carbonate equivalent (CCE) 65% minimum.

Sieve sizes used to determine effectiveness of the material are #8, #40, and #60. Effective Neutralizing Material (ENM) is calculated by assigning values to the retained portions. Material retained on the #8 has no value, material retained on #40 is allowed 25%, material retained on #60 is allowed 60%, while material passing the #60 is allowed 100%. These assigned percentages are added in the collected term, Fineness Factor (FF). ENM for the individual sample is calculated:

            % CCE          FF
    ENM = ---------  X  ---------  X  800
             100           100

Effective Magnesium (EMg) content is calculated:

             % Mg           FF
    EMg  = ---------  X  ---------  X  2000
              100           100

Stockpile rolling average is calculated by averaging the last three samples secured from the sampled stockpile.

The Missouri Agricultural Experiment Station is the research arm of the
College of Agriculture, Food and Natural Resources
at the University of Missouri

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