Memory Game PLSC101 Memory Game 2Online version Lab Group 7 Topics: Soil parts and tillage by cindy s Made up of decaying animal and plant residue degraded by organisms Gravitational Water Moldboard Plow Ridge Tillage Humus Mollisol Conventional Tillage Light tillage to mix up and move crop residue on the surface. Conservation Tillage Deep tillage to bury residue, followed by shallow tillage to smooth Top layer of soil that is made up of organic matter, water, air and mineral particles Pore Space Mulch Tillage Soils that are formed under grasslands, very good for crop growth. Topsoil No-Till Organic Matter Organic component of decomposed leaves and plant material