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Old 01-08-2013, 06:04 PM
Skipster Skipster is offline
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Join Date: Dec 2010
Location: Billings, MT
Posts: 742
Quote:
Originally Posted by Smallaxe View Post
Innoculation onto bad ground is just about as useful as innoculation onto a gravel driveway... I hope this clears up what I think about innoculating problem turf w/out looking at HOW to fix the environment/habitat first...
Recall, too, that the link you posted also says that innoculation onto healthy stands usually doesn't work. It is nearly impossible to change the microbial populations in the environment. Applying Sumagreen's mix of microbes doesn't change populations in the soil at all.

Quote:
Originally Posted by Smallaxe View Post
The real issue is not the platitudes of aeration, moisture, pH and the organic substrates... It is in the proper management of those things... So HOW is that done???
You're starting to draw a distinction without a difference. Read your own link:

"To increase microbial activity in a soil one must make the environment optimal, or at least more favorable, in terms of aeration, moisture, and pH, and above all provide the organic substrates needed to fuel the population."

There are microbes that do millions of different things and are useful for millions of different things. Zuberer is saying that the microbes that do useful things for turfgrasses thrive in environments that turfgrasses thrive in. How do you manage those things? You aerate to encourage soil oxygenation and plant root function, irrigate to maintain plant life, and maintain pH in the 5.5 to 6.5 range. Organic substrates will occur from turf roots, thatch (ALL grasses produce thatch), and returning grass clippings to the lawn. Sandy soils could benefit from some OM addition, but the effect is usually only noticeable during the establishment phase.

Quote:
Originally Posted by Smallaxe View Post
Does dumping compost onto a lawn provide the correct management strategies of incorporating organic substrates???
Again, read your own link:

"bear in mind that amendments such as compost, which is essentially microbially decomposed organic materials, do not contain high levels of readily available carbon. Rather, they provide slowly useable substrates and contribute directly to the soil organic matter pool."

Dumping compost on a lawn does very little to improve turf health and microbial activity of soils that already have at least some OM present. Remember, you still need proper aeration, pH, and moisture just to break down compost. You won't get any benefit from the compost if the soil already has some OM present.

The lesson from your link and from the research is to manage turf how the universities have been telling us for quite some time: proper aeration, pH management, proper irrigation, proper fertility, and return the clippings to the lawn. It's not really any harder than that.
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