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