Ch 9 Food, Agriculture & Pest Control Tools A B Health problem caused by not eating enough necessary nutrients Malnutrition Widespread food shortage that results in many people not having enough food Famine Upper layer of soil consisting of rock particles, water, air and organic matter Topsoil Loss of fertile soil when it is blown away by wind or washed away by water Erosion Raising crops without using many synthetic pesticides or fertilizer Organic Farming Accumulation of salts in the soil Salinization Changes in the genetic makeup of pest populations thatresult in the ability to tolerate particular pesticides Resistance Soil in which most plants are healthy and able to grow rapidly Fertile soil Farming without using a lot of energy, pesticides, fertilizer and water Low Input Farming Using living organisms or naturally produced chemicals to control pest Biological Pest Control