As part of a multiyear collaborative effort, Northern Arizona University with Navajo Technical University (NTU) and the U.S. Forest Service have partnered to study the status of pinyon-juniper woodlands and develop restoration techniques.As part of a multiyear collaborative effort, Northern Arizona University with Navajo Technical University (NTU) and the U.S. Forest Service have partnered to study the status of pinyon-juniper woodlands and develop restoration techniques.