Soil Health

Discussion in 'Organic Lawn Care' started by phasthound, May 27, 2012.

  1. Duekster

    Duekster LawnSite Fanatic
    from DFW, TX
    Posts: 7,961

    The products I look at have pretty low N and not enough to elicite the responce seen. Even if the product were 100% N and Fe the application at 8# per AC would not give the responce alone.

    As a matter of fact there is little we can do to significantly change the soil hence the reason we have to keep applying fertilizers of any type to turf. Granted, a little bit of sugar and colonizing with microbes there is little chance they will thrive in poor soils. The Carbon / Nitrogen cycles and the impact on plants and bacteria is pretty complex and never in a steady enviroment.

    In an old forest we have leaves fall, and continually decomposing over centuries.... in turf we rake up the leaves and often take away the grass clippings.
     
  2. Smallaxe

    Smallaxe LawnSite Fanatic
    Posts: 10,080

    There are lots of different microbes in the soil... some cause 'Brown Patch, take-all-patch. negrotic ring spot, etc., etc.

    microbes live on food and water and even eat up gasoline/oil spills... they are everpresent and unstoppable...

    The point of the various writings is that 'good cultural practices', yet we never seem to get to the details of what good cultural practices really are... 1" of water per week? mow at 3.5" height in the heat of summer?

    Soil Structure is very important and it is created by what methods?
    The role that microbes play in the formation of soil structure, is likely different than the role played by other decomposers, disease promoters, carbon exchangers, or AM mututualists...
     
  3. Duekster

    Duekster LawnSite Fanatic
    from DFW, TX
    Posts: 7,961

    Proper management is dependant upon your crop and your goals for that crop.


    http://aggie-horticulture.tamu.edu/faculty/davies/research/images/VAM2.html
     
  4. Duekster

    Duekster LawnSite Fanatic
    from DFW, TX
    Posts: 7,961

    The Nursery Crop Physiology lab at the Department of Horticulture has been working over the past 25 years with ectomycorrhizal and arbuscular mycorrhizal fungi under severe outplanting conditions (Texas lignite coal, strip mines, and highway revegetation sites). They have also characterized mycorrhizal associations in herbaceous and woody plant species and some of the mechanisms of enhanced drought, nutrient relations and temperature stress tolerance of mycorrhizal plants. Mycorrhizal plants can also be used to phytoremediate soil contaminated with petroleum and heavy metals such as chromium (Cr).

    http://aggie-horticulture.tamu.edu/faculty/davies/research/mycorrhizae.html
     
  5. Smallaxe

    Smallaxe LawnSite Fanatic
    Posts: 10,080

    Grass, turf, cool-season grasses...
     
  6. Smallaxe

    Smallaxe LawnSite Fanatic
    Posts: 10,080

    Still doesn't tell us how to make the AM fungi, be happy and thrive... do they thrive in any kind of environment or do they prefer certain living conditions, as does the rest of the living world...?
     
  7. Kiril

    Kiril LawnSite Fanatic
    Posts: 18,298

    Amusing. You have replaced one "opinion" piece with another. The above piece is not referenced at all, it merely lists a very small handful of sources for "Further reading." Nice to see you skip ..... :rolleyes:
     
  8. Duekster

    Duekster LawnSite Fanatic
    from DFW, TX
    Posts: 7,961

    They thrive in symbiotic relationships with different plants. One would assume if you made a proper selection of the plant and the related VAM then you should be good to go. There is also the shotgun aproach many companies use, they blend many types in a package.

    Note the harsh conditions sampled in the field trials.
     
  9. Duekster

    Duekster LawnSite Fanatic
    from DFW, TX
    Posts: 7,961

    http://www.extension.umn.edu/distribution/cropsystems/M1272.html

    In this link, they say the heavy use of nitrogen will interupt the Rhizobia symbiotic relationship with the plants.


     
  10. Skipster

    Skipster LawnSite Bronze Member
    Posts: 1,074

    The linked paper was a redux version of a peer-reviewed paper that was made easier to read for the general public. All the conclusion in the paper were taken from the author's own work and the work listed in the "further reading" section.

    Still, no one has produced research to the contrary ....
     

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