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