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The Magruder program is a proficiency testing program for fertilizers. Each subscribing laboratory receives one or two samples each month. The samples contain varying levels of plant nutrients as well as trace metal contaminants. |
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2023 SUBSCRIPTIONS NOW ACCEPTED
| DASHBOARD >>> Click on DASHBOARD for subscribing to 2023 season on our new web-based platform. |
| CLICK HERE FOR DASHBOARD INSTRUCTIONS |
| CLICK HERE FOR NEW LAB PORTAL INSTRUCTIONS |
| Sample schemes offered are shown below. |
| Regular sample scheme: 12 samples as currently sent in program ($360 plus shipping) |
| N sample scheme: 3 samples ($130 w/Regular scheme; $200 alone; plus shipping) |
| P sample scheme: 3 samples ($130 w/Regular scheme; $200 alone; plus shipping) |
| K sample scheme: 3 samples ($130 w/Regular scheme; $200 alone; plus shipping) |
| The current list of samples proposed for 2023 are shown HERE. |
Samples are sent according to the scheduled date after payment is made. Lab must enroll in all the samples for a particular sample scheme. All samples in a previous round will be sent with payment made during the subscription year.