It takes one year to produce one inch of topsoil.False. hundreds or thousands of yearsAcid precipitation and the leaching of minerals and metals affect the pH of soil and the types of plants that can grow in it.TrueToday, human activities cause less erosion than natural events.False. MoreAlthough labor-intensive, intercropping is probably the only sustainable way to farm mountains.False. terracing.Desertification is the loss of more than 50 percent of soil productivity.False. 10 percent
