specifying soils for complex landscapes presentation outline
Download
Skip this Video
Download Presentation
Specifying Soils for Complex Landscapes presentation outline

Loading in 2 Seconds...

play fullscreen
1 / 20

Specifying Soils for Complex Landscapes presentation outline - PowerPoint PPT Presentation


  • 71 Views
  • Uploaded on

Specifying Soils for Complex Landscapes presentation outline. Soil Design Strategies • Natural vs Blended • Simple vs Complex Specifying Blended Soils • components • mix ratios vs use • specification controls Teardrop Park • horticultural strategy

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Specifying Soils for Complex Landscapes presentation outline' - arva


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
specifying soils for complex landscapes presentation outline

Specifying Soils for Complex Landscapespresentation outline

Soil Design Strategies

• Natural vs Blended

• Simple vs Complex

Specifying Blended Soils

•components

• mix ratios vs use

• specification controls

Teardrop Park

• horticultural strategy

• specifications

Robert Pine, PE, MLA, ASLA

Pine&Swallow

ENVIRONMENTAL

slide2

Soil Design StrategiesNatural vs Blended

Natural

“Loam” Dealer

Blended Soils

Controlled performance,

Sustainable

Limited Resource

Mix of whatever

came in that day

Pine&Swallow

Specifying Soils for Complex Landscapes

simple vs complex landscapes

Soil Design StrategiesNatural vs Blended

Simple vs Complex Landscapes

Tanglewood

Teardrop Park

Pine&Swallow

Specifying Soils for Complex Landscapes

slide4

Specifying Blended Soils Components

Sand

Base Loam

Compost

Blended Soil

Pine&Swallow

Specifying Soils for Complex Landscapes

slide5

Specifying Blended Soils Components

Natural Topsoil

Provides

• silt and clay particles

• stable organics

• cation exchange capacity

• natural soil biology

As percentage in a blend increases

• nutrient and water holding capacities ↑

• infiltration rate and aeration ↓

• resistance to compaction ↓

Note:

Good quality topsoil is

required for appropriate

gradation, organics and soil biology.

Pine&Swallow

Specifying Soils for Complex Landscapes

slide6

Specifying Blended Soils Components

Uniform Coarse Sand

Provides

• structure

• macropore space

As percentage in a blend increases

• aeration ↑

• infiltration rate ↑

• resistance to compaction ↑

• water holding capacity ↓

• nutrient holding capacity ↓

Note:

Well graded sand reduces

aeration, infiltration and resistance

to compaction!

Pine&Swallow

Specifying Soils for Complex Landscapes

slide7

Specifying Blended Soils Components

Mature Compost

Provides

• organic content

• micro-organisms

As percentage in a blend increases

• water holding capacity ↑

• soil biology ↑

• resistance to compaction ↑

• resistance to anaerobic conditions ↓

Note:

Immature compost creates bad soil biology and increased vulnerability to anaerobic conditions.

Pine&Swallow

Specifying Soils for Complex Landscapes

slide8

Specifying Blended Soils Specification Controls

Primary Mix Design Specifications

Purpose

• define the soil blend

• control soil properties

• Estimated Mix Ratio for each soil

• Grain Size Distribution

• Coefficient of Uniformity

• Organic Content

• Horticultural Requirements (CEC, pH, nutrients, etc.)

• Compaction Range

• Saturated Hydraulic Conductivity at maximum compaction

Pine&Swallow

Specifying Soils for Complex Landscapes

slide9

Specifying Blended Soils Specification Controls

Primary Process Specifications

Purpose

• Testing and confirmation of base materials: sand, loam, compost

• Testing to confirm mix ratios

• Batch production and testing prior to delivery for quality control

• Handling and Placement procedures

• Control of wet soils

  • Ensure quality control
  • Protect soil quality

Pine&Swallow

Specifying Soils for Complex Landscapes

slide10

Teardrop Park Horticultural Strategy

Pine&Swallow

Specifying Soils for Complex Landscapes

slide11

Teardrop Park Specifications

High Use Turf

  • Soil Requirements
  • • Withstand heavy use
  • • High infiltration rate

Specifications

Mix Ratio * 3S : 1.5L : 1C

% passing 270 sieve 11 -14%

Uniformity ratio D70/D20 < 4.5

Organic content 4 - 5%

Compaction 86 - 88%

Hydraulic conductivity > 4 inches/hr

* S = Sand L = Base Loam C = Compost

Pine&Swallow

Specifying Soils for Complex Landscapes

slide12

Teardrop Park Specifications

Passive Use Lawn

(not used at Teardrop Park)

Specifications

Mix Ratio * 2S : 1.5L : 1C

% passing 270 sieve 15 - 18%

Uniformity ratio D70/D20 < 5.0

Organic content 4 - 6%

Compaction 84 - 86%

Hydraulic conductivity > 3 inches/hr

* S = Sand L = Base Loam C = Compost

  • Soil Requirements
  • • Withstand moderate use
  • • Moderate infiltration rate
  • • Reduced water requirements

Pine&Swallow

Specifying Soils for Complex Landscapes

slide13

Teardrop Park Specifications

Horticultural Subsoil

  • Soil Requirements:
  • • rooting zone for trees / shrubs
  • • free draining
  • • not vulnerable to anaerobics

Specifications

Mix Ratio * 2S : 1L

% passing 270 sieve 14 - 18%

Uniformity ratio D70/D20 < 6.0

Organic content 2 - 3%

Compaction 82 - 85%

Hydraulic conductivity > 2 inches/hr

* S = Sand L = Base Loam C = Compost

Pine&Swallow

Specifying Soils for Complex Landscapes

slide14

Teardrop Park Specifications

Trees with understory

no ground cover

Specifications

Mix Ratio * 2S : 1L : 3C

% passing 270 sieve 11 - 16%

Uniformity ratio D70/D20 < 6.0

Organic content 9 - 11%

Compaction 84 - 86%

Hydraulic conductivity > 3 inches/hr

* S = Sand L = Base Loam C = Compost

  • Soil Requirements:
  • • recreate natural forest soil profile
  • • encouraging shallow feeder roots
  • • deep rooting in horticultural subsoil

Pine&Swallow

Specifying Soils for Complex Landscapes

slide15

Teardrop Park Specifications

Trees with understory

with ground cover

  • Soil Requirements:
  • • recreate natural forest soil profile
  • • suitable for ground cover plants

Specifications

Mix Ratio * 2S : 1L : 2C

% passing 270 sieve 11 - 16%

Uniformity ratio D70/D20 < 6.0

Organic content 6 - 9%

Compaction 86 - 88%

Hydraulic conductivity > 3 inches/hr

* S = Sand L = Base Loam C = Compost

Pine&Swallow

Specifying Soils for Complex Landscapes

slide16

Teardrop Park Specifications

Marsh Planting Soil

Specifications

Mix Ratio * 1S : 2C

% passing 270 sieve 8 - 12%

Uniformity ratio D70/D20 < 4.5

Organic content 10 - 12%

Compaction 82 - 85%

Hydraulic conductivity > 4 inches/hr

Note: Medium Sand not Coarse

* S = Sand L = Base Loam C = Compost

  • Soil Requirements:
  • • saturated conditions
  • • support wetland plantings
  • • high water holding capacity

Pine&Swallow

Specifying Soils for Complex Landscapes

slide17

Teardrop Park Specifications

Boulder Base Mix

  • Soil Requirements:
  • • structural support for
  • heavy boulders
  • • horticultural support for plantings

Specifications

Mix Ratio:

1 part 1.5 to 2 inch crushed stone

1 part tree soil mix

Placed beneath heavy boulders

and compacted thoroughly

Pine&Swallow

Specifying Soils for Complex Landscapes

slide18

Teardrop Park Specifications

Steep slopes

  • Soil Requirements:
  • • provide long term stability
  • • protection from erosion
  • • tree horticultural support

Specifications

Mix Ratio:

2 to 4 oz fibers per cubic foot

thoroughly mixed with

planting soil

Placed and compacted to normal compaction range for specified planting medium

Pine&Swallow

Specifying Soils for Complex Landscapes

slide19

Teardrop Park Specifications

Trees in paved areas

  • Soil Requirements:
  • • provide tree rooting volume
  • • provide support for pavement
  • • prevent settlements

Specifications

Mix Ratio * 4S : 1L : 1C

% passing 270 sieve 7 - 9%

Uniformity ratio D70/D20 < 3

Organic content 2 - 3%

Compaction 92 - 94%

Hydraulic conductivity > 6 inches/hr

* S = Sand L = Base Loam C = Compost

Pine&Swallow

Specifying Soils for Complex Landscapes

specifying soils for complex landscapes recap

Specifying Soils for Complex Landscapesrecap

Soil Design Strategies

• Natural vs Blended

• Simple vs Complex

Specifying Blended Soils

•components

• mix ratios vs use

• specification controls

Teardrop Park

• horticultural strategy

• specifications

Robert Pine, PE, ASLA

Pine&Swallow

ENVIRONMENTAL

ad