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 Conservation Tillage Conventional Tillage Moldboard Plow Made up of decaying animal and plant residue degraded by organisms Top layer of soil that is made up of organic matter, water, air and mineral particles No-Till Light tillage to mix up and move crop residue on the surface. Pore Space Ridge Tillage Deep tillage to bury residue, followed by shallow tillage to smooth Topsoil Organic Matter Mollisol Organic component of decomposed leaves and plant material Mulch Tillage