Day 6 notes

Day 6 notes - Notes 2/8/08 Day 6- Secondary Particles (Soil...

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Notes 2/8/08 Day 6- Secondary Particles (Soil Structure) 1. Soil Structure - The arrangement of primary soil particles into secondary particles called aggregates or peds. 2. Types of Structure: a. Spheroidal i. Characteristic of surface A horizons; subject to wide and rapid changes 1. Granular- [porous] a. Most common in A-horizons 2. Crumb- [very porous] a. Most common in A-horizons b. Plate-like (or Prismatic) i. Common in E-horizons, may occur in any part of the profile. Often inherited from parent material of soil, or caused by compaction 1. Platy a. Most common in A and E horizons c. Block-like i. Common in B-horizons, particularly in humid regions. May occur in A-horizons also 1. Angular blocky- [sides meet at distinct angles] a. Common in B horizons, with higher amounts of clay 2. Subangular blocky- [rounded corners] a. In A, E, and B-horizons, of little to moderate clay content d. Prism-like i. Usually found in B-horizons. Most common in soils of arid and semi-arid regions. ii.
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This note was uploaded on 03/26/2008 for the course AGRO 301 taught by Professor Dr.tomhallmark during the Spring '08 term at Texas A&M.

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Day 6 notes - Notes 2/8/08 Day 6- Secondary Particles (Soil...

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