This page is for cooperators participating in our soil fertility and nutrient management study. Directly below you will find links for all the materials that have been provided to you as part of this study as well as videos demonstrating the protocols. After the materials and videos, you will find posts updating our progress on the study.
Cooperator Materials
Protocols and Handouts
How-to Videos
Step 1: Assembling your Horiba nitrate meter
Step 2: Collecting your petiole samples
Step 3: Calibrating your Horiba nitrate meter
Step 4: Using the Horiba nitrate meter to test hop petioles