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