Olds College LHAP Decompaction Techniques - LHAP 303
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Decompaction Techniques - LHAP 303

LHAP 303-61-40682 (FA25) - Softscape Maintenance/Softscape Repair/Decompaction Techniques - LHAP 303.pptx

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Slide 1 Decompaction Techniques Slide 2 Soil Compaction Review… It’s time to play: JEOPARDY!!!!! Slide 3 Slide 4 What effects does soil compaction have? Degrading or compromising the soil structure Increase the bulk density Decrease soil porosity Adversely affects Physical - structure Chemical - availability of nutrients Biological properties - microorganism Function of the soil Slide 5 Reduced plant growth, yield & quality Increase surface water run-off Soil erosion Excess salts cannot be leached out of the root zones Tree roots increase water saturation into groundwater Poor soil quality created by compaction inhibits tree roots saturation, increasing water runoff Slide 6 Tools to Measure Compaction Penetrometer Measures compressive strength of soil quickly and easily Penetrometer to measure soil compaction Shovel Simple tool to assess compaction Slide 7 What Prevention Strategies can we utilize? Slide 8 Slide 9 Equipment for Decompaction Large Scale Winged Subsoiler Pull-behind implement Decompact soil by inverting the topsoil Creates large gaps that allow deep penetration of water Will not break up clods if used on wet soil! (soil should be dry enough to create fractures and cracks rather than just grooves) Sumo Subsoiler Slide 10 Slide 11 Disc Tiller Favourable microsites are created for plant growth Breaks up and smooths out the surface Used to till soil where crops are going to be planted Can also be used to chop up unwanted weeds and crop remainders Shallow Tillage With Hiller Discs Slide 12 Straight Ripper Shank One or two vertically mounted Good for dry soils with low clay content Cross ripping on severely impacted sites 3-Shank Ripper Slide 13 Decompaction Equipment Small Scale Rototiller (front or rear tine) Versatile Incorporate amendments Break up clumps of soft, loamy soil Forward and reverse options Adjustable depth regulators Hydraulic options are best for really compacted soils Slide 14 Deep Tine Aeration Aeration Differences Slide 15 Tree Root & Air-spades High powered compressed air gun Excavates soil around trees Does not damage the roots Blasts away loose material Protects the delicate root tissue Slide 16 Uses for air spades: Root crown excavation Root girdling Air tilling Improve soil decompaction Root zone trenching Utilities or irrigation lines that need to be trenched around trees

Slide Outline

Extracted text and media from the presentation.

Slide 1

Decompaction Techniques

Slide 2

Soil Compaction Review…

It’s time to play: JEOPARDY!!!!!

image5.jpg

Slide 3

image21.jpg image20.jpg

Slide 4

What effects does soil compaction have?

Degrading or compromising the soil structure

Increase the bulk density

Decrease soil porosity

Adversely affects

Physical - structure

Chemical - availability of nutrients

Biological properties - microorganism

Function of the soil

Slide 5

Reduced plant growth, yield & quality

Increase surface water run-off

Soil erosion

Excess salts cannot be leached out of the root zones

Tree roots increase water saturation into groundwater

Poor soil quality created by compaction inhibits tree roots saturation, increasing water runoff

image10.png image1.png

Slide 6

Tools to Measure Compaction

Penetrometer

Measures compressive strength of soil quickly and easily

Penetrometer to measure soil compaction

Shovel

Simple tool to assess compaction

image18.png image6.jpg

Slide 7

What Prevention Strategies can we utilize?

image8.jpg image13.jpg image22.jpg

Slide 8

image16.png image12.jpg

Slide 9

Equipment for Decompaction

Large Scale

Winged Subsoiler

Pull-behind implement

Decompact soil by inverting the topsoil

Creates large gaps that allow deep penetration of water

Will not break up clods if used on wet soil!

(soil should be dry enough to create fractures and cracks rather than just grooves)

Sumo Subsoiler

image17.jpg image7.jpg

Slide 10

image14.png

Slide 11

Disc Tiller

Favourable microsites are created for plant growth

Breaks up and smooths out the surface

Used to till soil where crops are going to be planted

Can also be used to chop up unwanted weeds and crop remainders

Shallow Tillage With Hiller Discs

image15.png

Slide 12

Straight Ripper Shank

One or two vertically mounted

Good for dry soils with low clay content

Cross ripping on severely impacted sites

3-Shank Ripper

image3.jpg

Slide 13

Decompaction Equipment

Small Scale

Rototiller (front or rear tine)

Versatile

Incorporate amendments

Break up clumps of soft, loamy soil

Forward and reverse options

Adjustable depth regulators

Hydraulic options are best for really compacted soils

image9.jpg image2.jpg

Slide 14

Deep Tine Aeration

Aeration Differences

image19.jpg

Slide 15

Tree Root & Air-spades

High powered compressed air gun

Excavates soil around trees

Does not damage the roots

Blasts away loose material

Protects the delicate root tissue

image11.png

Slide 16

Uses for air spades:

Root crown excavation

Root girdling

Air tilling

Improve soil decompaction

Root zone trenching

Utilities or irrigation lines that need to be trenched around trees

image4.jpg

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