... contours of a hill rather than up and down. In this way water does not run off and take the soil with it. 41. Conservation consists of the following things except_______. a. the prevention of ... past, most people believed that the world’s resources could never be used up. Today, we know that this is not true. An important part of conservation is the prevention of waste – waste of forests, ... yearly rotation of crops – that is, growing different crops on the same land from year to year. In this way, different elements of the soil have time to replace lost elements. Farmers can help enrich...