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. |
2024 SUBSCRIPTIONS NOW ACCEPTED
PURCHASE DASHBOARD >>> Click on PURCHASE DASHBOARD to subscribe for samples in 2024 season. |
CLICK HERE FOR DASHBOARD INSTRUCTIONS |
CLICK HERE FOR LAB PORTAL INSTRUCTIONS |
Sample schemes offered are shown below. |
Regular sample scheme: 12 samples ($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 2024 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.