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