It seems that trees that are 10 feet high do a good job of controlling ground drifting yet they don't spread out too wide. For that reason, I feel villosa lilac is a good choice for a field shelterbelt. And because green ash doesn't spread out very much, it works well, too. The unit was demonstrated on some of the belts in the area and it worked well. John fears that if such research is not conducted, we're in danger of the losing the trees.
Shelterbelts are good for the soil, good for the environment and good for humanity.
Establishing and maintaining field shelterbelts is time-consuming and often difficult. Farmers who bother with field shelterbelts deserve to be commended.