Good Morning Matthew, 

Thank you for contacting the U of M Extension Service. 

The first thing I would do is have the soil tested in this area: https://extension.umn.edu/managing-soil-and-nutrients/soil-testing-lawns-and-gardens

The drought we've had the past two years has been really hard on trees. If you planted the Norway pines during this time, it would be critical to water them often to get them established. In Wright county, are you in sandy soil? 

Here is a link about best practices for planting trees: https://extension.umn.edu/news/best-practices-planting-trees-and-shrubs

This information states: 

1. Water consistently. Getting a new tree or shrub into the ground does not signal the end of the job! New plantings require more frequent watering than established trees and shrubs. Don’t sabotage your garden’s success by neglecting this important point. For one to two weeks after planting, water daily. For three to 12 weeks after planting, water every two to three days. Thereafter, water weekly until established. Give your plantings extra tender-loving care for one to two years after getting them in the ground.

Here is a link about growing Norway pine: https://extension.umn.edu/managing-woodlands/managing-red-norway-pine-forests#bark-beetles-1570610 Although they are discussing forest management, if you scroll down, this discusses all the pests and diseases for Norway pine. 

Good Luck!