Structural deterioration Flashcards
1
Q
What are pods/aggregates
A
Soil particle arrangements in different horizons, indicate workability
2
Q
Granular/crumb structures
A
A-horizon, small spherical grains, easy water movement
3
Q
Blocky structures
A
B horizon, clay accumulates, large angular blocks, resist water movement
4
Q
Prismatic/columnar structures
A
B horizon, vertical pillars, clay accumulates, resist water movement
5
Q
Platy structures
A
Sheets, greatly impair water movement, forest and high latitude soil
6
Q
Is it common
A
Rare naturally, common agriculturally
7
Q
What causes structural deterioration
A
Less topsoil OM as agriculture mixes, soil particles splitting off as can’t withstand disruption, compaction
