One method of soil conservation is the use of windbreaks. Windbreaks are barriers formed by trees and other plants. Farmers plant these barriers around their fields.
They maintain wild or cultivated plant life along rivers or streams, and windbreaks, strategically planted strips of trees or other plants, protect crops and soil from wind erosion.
The second line, right next to it, can be shorter trees and other plants with leaves. Locally grown trees and plants are considered the best choices for windbreaks.
I think I have that information on my website too, and maybe better there than in the book, because I did a lot of research on windbreaks years ago from the Great Plains up in the upper Midwest.