Environmental pedology sos 5716 dr willie harris
Download
1 / 20

Environmental Pedology SOS 5716 Dr. Willie Harris - PowerPoint PPT Presentation


  • 102 Views
  • Uploaded on

Environmental Pedology SOS 5716 Dr. Willie Harris. Distance Education Special Field Assignment Spring Semester 2008 Joe Sewards. Objectives. Obtain experience and feedback in soil description and interpretation

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 ' Environmental Pedology SOS 5716 Dr. Willie Harris' - grant-holden


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
Environmental pedology sos 5716 dr willie harris

Environmental PedologySOS 5716Dr. Willie Harris

Distance Education Special Field Assignment

Spring Semester 2008

Joe Sewards


Objectives
Objectives

  • Obtain experience and feedback in soil description and interpretation

  • Observe how two soils differ based on soil forming factors and genetic processes

  • Share interpretations of the soils


Soils of the hastings florida area
Soils of the Hastings, Florida Area

  • Background

    • Hastings, Florida is known as the “Potato Capital” of Florida

    • It is a highly agricultural area where potatoes, sweet sorghum, cabbage and sod are the primary crops.


Geographic characteristics
Geographic Characteristics

  • Hastings is on the border of St. Johns and Putnam Counties.

  • It averages seven feet above mean sea level.

  • Deep Creek is a tributary of the St. Johns River, is about 2 miles northeast of Hastings and is tidally influenced.


Where soil descriptions are located
Where Soil Descriptions are Located

  • FPWACS – The Florida Partnership for Water, Agriculture and Community Sustainability at Hastings.

  • Formerly a U.F. research facility dedicated to potato research.

  • Now a U.F. demonstration and research facility dedicated to low-impact development and alternative agriculture

Area of Project

On General Soil Map


Index to detailed map sheets
Index to Detailed Map Sheets

  • The average elevation at the FPWACS site is four feet above mean sea level.

  • Drainage ditches that are, at times, dry have been observed to spontaneously fill with water during high tides.

Hastings


Deep Creek

Area of project

State Road 207

Town of

Hastings


Soil 1

Soil 2

U.F.FPWACS


Description of soil 1
Description of Soil 1

  • From the St. Johns County Soil Survey:

    • Wabasso fine sand (soil type 21)

    • Poorly drained, nearly level, slope 0 to 2 percent

    • Surface layer - black, fine sand, upper 4 inches

    • Very dark gray fine sand in lower 2 inches

    • Subsurface layer is light gray, fine sand to about 25 inches

    • Lower part of subsoil is about 13 inches thick; upper 8 inches is brown fine sandy loam; next 5 inches is grayish brown sandy clay loam


Observations and evaluations of soil 1
Observations and Evaluations of Soil 1

“Ap” horizon – 25-30 cm

Texture – Sandy

Color – Gleyed 2, 2.5, 5B

Boundary – Clear, abrupt

Structure – Weak

Infiltration - High

“E” horizon – 12-15 cm

Texture – Sandy

Color – Gleyed 2, 6, 5B

Boundary – Gradual, diffuse

Structure – Moderate

Infiltration - Moderate

“Bt” horizon – 25 cm

Texture – Sandy

Color – Gleyed 2, 8, 10B

Boundary – Gradual, diffuse

Structure – Moderate

Infiltration - Moderate

Redox present

“Btg” horizon – 12-25 cm

Texture – Sandy clay

Color – Gleyed 2,

Boundary - Diffuse

Structure – Moderate

Infiltration - Low

Redox present


Another view of soil 1
Another view of Soil 1

“Ap”

“E”

All Sandy texture

“Bt”

“Btg”

Sandy clay


Soil 1 ap horizon
Soil 1 – “Ap” Horizon

  • Sandy texture

  • Weak structure

  • Cannot form a ribbon


Soil 1 btg horizon
Soil 1 – “Btg” horizon

  • Sandy clay texture

  • Gleyed color with redox

  • Can easily form a ribbon


Soil 1 classification
Soil 1 Classification

  • Epipedon- Umbric

  • Subsurface horizon – Argillic

  • Soil order – Alfisol

Soil 1 Properties

Pit for Soil 1 filling with water

  • Infiltration - High

  • Hydraulic conductivity – High (sandy texture)

  • Available water - High

  • Soil wetness class - 5

  • Limitations

    • Dwelling w/basements - severe

    • Septic tanks - severe

    • Local roads and streets - poor

Soil 1 Site Characteristics

  • Position – Stream terrace

  • Parent material – Marine

  • Soil slope – Nearly level, 0 to 2%

  • Surface runoff – Ponded to very slow

  • Erosion potential – Very low



Description of soil 2
Description of Soil 2

Excerpts from the St. Johns County Soil Survey

Floridana Fine Sand

  • Poorly drained, nearly level, slope 0 to 2 percent

  • Surface layer is black, fine sand about 11” thick

  • Seasonal high water table within 10” for 4 – 6 months

  • Natural vegetation: slash pine, cabbage palm, water oak, etc. Most areas cleared and used for cabbage and potato production.

  • … severely limited due to wetness.


Soil 2
Soil 2

“Ap” horizon – 25-30 cm

Texture – Sandy

Color – 7.5YR, 5, 2

Boundary – Clear, abrupt

Structure – Weak

Infiltration - High

“Eg” horizon – 15 cm thick

Texture – Sandy

Color – 7.5YR, 6, 1

Boundary – Wavy, diffuse

Structure – Moderate

Infiltration -Moderate

“Bh” horizon – 10-20 cm thick

Texture – Sandy

Color – 7.5YR, 4, 2

Boundary – Gradual, wavy

Structure – Moderate

Infiltration - Moderate

“Btg” horizon –15-30 cm thick

Texture – Sandy clay

Color – Gleyed 2, 8, 10B

Boundary – Diffuse, wavy

Structure – Moderate (strong ribbon)

Infiltration –Slow

Redox concentrations present


Another view of soil 2
Another View of Soil 2

  • Ap horizon

  • E horizon

  • Bh horizon

  • Btg horizon


Soil 2 Classification

  • Epipedon- Umbric

  • Subsurface horizon – Argillic

  • Soil order – Alfisol

Soil 2 Properties

  • Infiltration - High

  • Hydraulic conductivity – High (sandy texture)

  • Available water - High

  • Soil wetness class - 4

  • Limitations

    • Dwelling w/basements - severe

    • Septic tanks - severe

    • Local roads and streets - severe

Floridana Fine Sand

Soil 2 Site Characteristics

  • Position – Flood plain

  • Parent material – Marine

  • Soil slope – Nearly level, 0 to 2%

  • Surface runoff – Ponded to very slow

  • Erosion potential – Very low



ad