Soil test- what would you do?

Discussion in 'Landscape Architecture and Design' started by paul, May 31, 2002.

  1. paul

    paul Lawnsite Addict
    Messages: 1,625

    Just got a soil test back for a new sports field.

    pH 7.7
    Soluble salts 0.32
    Sodium 29
    Following are part per million
    P 9
    K 99
    Mg 607
    Ca 2936

    The CEC is 20.1
    %K 1.3
    %Mg 25.1
    %Ca 73
    %Na 0.6
    %H 0.0

    The proposed turf for the above fields are 50% Bluegrass and 50% Pern Rye.

    How would you correct the soils?
  2. lawnstudent

    lawnstudent LawnSite Senior Member
    Messages: 472


    turf installed yet or bare field?

  3. paul

    paul Lawnsite Addict
    Messages: 1,625

    no turf yet.
  4. kris

    kris LawnSite Bronze Member
    from nowhere
    Messages: 1,578


    I know you have the answer Paul :) This is a test isn't it? lol

    I really don't have much idea and rely on others for this.

    Nitrogen, phosphorus, and potassium (N-P-K) are the three nutrients plants extract from soil in greatest quantity. These are available in synthetic, organic, and mineral forms.

    Im guessing that the ph is to high for this turf ...perhaps add sulpher to lower it.The sulfur products found in nurseries contain 90 percent elemental sulfur.... The bacteria in soil will oxidize the sulfur; it then combines with water to form sulfuric acid, which acidifies the soil. Because this process relies upon active soil bacteria, sulfur is best applied in spring or summer, when the bacteria are most active.

    Please us know the correct way to read this.
  5. joshua

    joshua LawnSite Bronze Member
    Messages: 1,226

    you have 18lbs per acre of phosphorus, thats under the recommended 50-75lbs of (P). add 32-57lbs of P to correct it.
    you are 2lbs short of (K) per acre at the minimum. add 2-52 lbs of (K) to correct that.
    you are in acceptable ranges for (M)
    same for (Ca) acceptable again.

    ok now for the soil ph, soil ph of 7.5 -8.2 rduces availability of iron zinc, manganese. ok i don't know what exactly the type of soil you have so i'll list all 3 soil types with how to correct them from 8.0 to 6.5 --- sand -120lbs of (S)per/1000; loam -150lbs(S) per/1000; clay -200lbs(S) per/1000
    7.5 to 6.5 ---sand -50lbs(S) per/1000; loam 80lbs(S) per/1000; clay 100lbs(S) per/1000
    do not plant the grass before applying the sulfer, the sulfur will kill the grass.
    the salts index sounds good i think not sure on this one as long as the salt index is below i think 600 it is good or 1000 its one of those 2.

    hopefully i'm right with this one.
  6. SCL

    SCL LawnSite Senior Member
    Messages: 543

    Joshua and paul,
    As the ever present knowledge junky, where would I go to get this info if I needed it? What text or publication gives good basic answers? That said would a dose of gypsum be in line for this also to neutralize some of the salts?
  7. LawnLad

    LawnLad LawnSite Senior Member
    Messages: 738

    SCL - if you're willing to do the reading, Turf Grass Trends is a good publication to subscribe to.

    To answer the above question Paul... I'd have to do a little more reading myself. Interested to know what others think.
  8. lawnstudent

    lawnstudent LawnSite Senior Member
    Messages: 472


    is this to be a native soil sports field? What activities are planned for this field? What is the drainage of this field? How high is the water table in this area (will it create a drainage problem)? Will additional drainage work be performed before installation? What is the budget for installation? What is the schedule for the installation? When do they want the field operational? What is the budget for maintenance? Who will be maintaining this field? What is their experience? What is the soil type, structure & texture? Any other pertinent information that would be helpful before I open my mouth and show my ignorance?

  9. paul

    paul Lawnsite Addict
    Messages: 1,625

    Lawnstudent, The soils are native, Location is Fox Valley area. 3 fields are soccer fields and one baseball field. Water table is not a problem. useage will be for the 2004 season. Budget :) lets say under $100K, but over $35K. 14 acres of turf. Drainage will be by crowned centerline. Maintance wil be done by the park District.

    The CEC tells you alot about the soil texture.
  10. joshua

    joshua LawnSite Bronze Member
    Messages: 1,226

    paul, come on you didn't tell me if i was right, it took me about 30mins to go through my notes from school and handouts to figure that information out.

    scl, i know what i said from a arborculture class, but all turf classes at any college should teach that same info.

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