University:
Sam Houston State University
Course:
GEOL 3404 | Mineralogy
Academic year:

2023
Views:

323

Pages:

10
Author:

Ehelizenza0

Two Types of Structureless Soils   Single grained soils like sand Solid massive condition with no noticeable peds Internal Soil Drainage      important for proper plant growth Permeability can be determined by the color of the subsoil. Grey with some red or yellow streaks poorly drained soils Yellowish-brown or reddish brown with some grey mottling - as internal drainage improves Uniform bright color with few or no grey streaks or mottling – good internal drainage and aeration Objective 2: TERMS TO KNOW: Infiltration - The movement of water into the soil  Percolation - The movement of water through the soil  No-till planting - The planting of a crop into the previous crop stubble or a cover crop, disturbing only the immediate seed zone  Objective 2: TERMS TO KNOW: (Cont’d) Reduced-tillage - The elimination of one or more operational procedures from a conventional system of working the soil  Permeability - the characteristics of a soil which permits variations in the speed of air and water movement  Soil Types Influence Crop Selection  Light textured soil     Loamy textured soil   Oats peanuts beets majority of Louisiana crops grow best in a loamy textured soil. Heavy textured soil  Flooded rice   requires a heavy fine textured soil to prevent loss of surface water Sugarcane Determination of Soil Structure    determined by the way the particles of sand, silt, and clay are grouped together in aggregates Peds - naturally formed groups of soil particles Clods - are artificially formed groups of soil particles Structured Soil more desirable because it:  is easier to cultivate  allows more water intake  does not restrict root growth  encourages better drainage within pore spaces  allows entry of oxygen into the pore spaces after the water has drained  facilitates organic matter decomposition and the release of plant nutrients Destruction of Soil Structure Soil structure can be destroyed by:  working the soil when it is wet    repeated movement of equipment or livestock repeated use of equipment at the same depth in the soil continual flooding of the soil Improving Soil Structure  Leaving it alone, in time it will repair itself  Planting a green manure crop  Incorporating plant residue into the soil Infiltration and Percolation Rates    Rapid - spheroidal structure and single grained structure less soils Moderate - blocky and prismatic structure Slow - platy structure or massive structure less soil

Soil Properties Part 2

Related Documents

Recommended Documents

Description

Related Documents

Want to Download This Document?

Free up your schedule!

Take 5 seconds to unlock