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Old 05-01-2012, 11:55 PM
JoJo1990 JoJo1990 is offline
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Location: Minnesota
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Humic Acid and water retention study

I found this very interesting. Although the trial was on a putting green, it goes against most claims of humates increasing the water holding capacity in soils. Here is an excerpt from a summary for those that don't care to read peer reviewed articles... "...Humic substances did not increase moisture retention in
putting green soils as pure humic acid significantly
decreased soil volumetric water content compared to the
control. Both humic acid- and fulvic acid-treated plots had
lower soil moisture content readings than the control at a
depth of 10 to 15 cm during the growing season." -USGA 02-15-09

http://usgatero.msu.edu/v08/n04.pdf
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Old 05-02-2012, 09:28 AM
Kiril Kiril is offline
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USGA Turfgrass and Environmental Research Online is not a peer reviewed journal.
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Old 05-02-2012, 11:39 AM
mdlwn1 mdlwn1 is offline
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Does this trial contemplate the effects beyond actual water retention?...as in does a healthy stand of turf actually require less water retention. I had really bad dry spots untill i began to correct my potassium issues.....same amount of water, but now i have comparatively extreme drought resistance. Just posing a realistic application, I have no interest in this study as my own results are enough for me.
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Old 05-02-2012, 05:23 PM
JoJo1990 JoJo1990 is offline
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Quote:
Originally Posted by Kiril View Post
USGA Turfgrass and Environmental Research Online is not a peer reviewed journal.
Correct. This article was improperly placed in a batch of available online peer reviewed journal articles. The USGA does have online peer reviewed articles available, however.

Mdlwn1: This study was only on a sand based golf course putting green. Although it would be geared for the golf world, it may have some impacts if an LCO was dealing with a very high sand content soil base. There are lots of studies that show very different results in a loam or clay soil structure. I simply found this article interesting because my initial thought was that it would in fact increase the water retention and holding capacity of the sandy soil. I wonder if a prolonged study would change the results.
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