Page:Tree Crops; A Permanent Agriculture (1929).pdf/343

 for pound than most of the wild nuts that we store in the attic or permit to lie in the woods.

The unplowable lands can be classified as:

(1) Steep lands,

(2) Rough lands,

(3) Odd corners of lands including farm windbreaks,

(4) Overflow and wet lands.

1. These lands belong naturally in grass and trees and water pockets. If not too rough or too steep much of this kind of land can be cultivated in strips with water pockets and trees as above mentioned. In places that are too steep to be cultivated the water pockets can still be used to save the land and nourish the trees. On land too steep to have water pockets that are large enough to hold all of the rainfall, small ones may be used for getting trees established and for partial irrigation.

2. Rough pasture land. Here is one of the greatest wastes in land utilization in America.

The low yield of these hilly pastures has just been mentioned (page 268). Nearly all such areas have undergone cultivation by plow until by the processes of erosion most of the loose top soil has been removed, often to the depth of