Erosion is the enemy of both agriculture and civilization, according to J. Russell Smith, author of “Tree Crops,” a classic text on arboreal agriculture. Smith took a series of trips in the 1930s to the Mediterranean, Far East and Middle East to study land use. He was appalled by the vast stretches of destroyed and depleted land he encountered: ” Forest – field – plow – desert. That is the cycle of the hills under most plow agricultures.” Between the climate change, a problem not as visible as the coming oil shortage but a far greater danger to humankind. on hilly and sloping lands and the on flat plains, the world’s fertile topsoil continues to drift away or be washed away. So it is no exaggeration to say that topsoil erosion is as big a threat as
Just about every damaging factor in modern agriculture is absent from arboreal cultivation. Tree crops can actually yield significantly more food, including carbohydrates and animal feed. Once upon a time, in ancient Greece and among Native Americans in California , for example, the main source of bread was oak trees. The bottom line is that there are many alternative options that need to be explored.