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