NAPT samples are scheduled to be shipped from Logan, UT the first weeks of February, May, August, and November. There will be four exchanges each of five soil samples, three plant samples, and/or three water samples, depending on the program you have enrolled in. The two-time exchange for Soil Only and Soil & Plant programs will continue to be available. You can select only those quarters in which you will participate, rather than the normal four-time exchange. Please see the NAPT Information Sheet for program details and pricing.

To participate in the PAP program, participants must adhere to the PAP Ethics Declaration. When enrolling in the PAP program, please read, sign and return the Ethics Declaration to us at NAPT@soils.org.

NAPT Info and Pricing Sheet | Contact Us

Current Labs: Renew online | Change program | Print your enrollment letter

New Labs: Enroll online here 

If paying for enrollment by mail, please print and send the form to the address below and make checks payable to: Soil Science Society of America. Please notify us before sending payment by mail. We also process purchase orders. Please contact us to arrange this.

Soil Science Society of America
5585 Guilford Road
Madison, WI 53711  USA

Email: napt@soils.org