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Old 08-27-2012, 11:11 PM
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Great ph info chart.

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Old 08-27-2012, 11:13 PM
turfmd101 turfmd101 is offline
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Fat area ranges good uptake. Thin area range poor uptake.
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Old 08-28-2012, 10:11 AM
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Yes, those are pretty nice - Nutrient availability at various pH ranges.

I've always thought it was interesting how Fe drops off so quickly as approach neutral and higher. What might be the typical pH of rainwater?
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Old 08-28-2012, 02:33 PM
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I think I remember reading the ph of rainwater is typically 5-6. In some areas lower than that. I believe this explains why you can water a lawn with an inch of groundwater and it looks nowhere as good as what an inch of rain will do.
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Old 08-28-2012, 03:02 PM
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they claim our treated water is 8.5-9.5 range...I think I understand this is not so good for growing most plants -especially as the soil is extrmely basic as well-

am I understanding this correctly?
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Old 08-28-2012, 08:43 PM
turfmd101 turfmd101 is offline
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Wonder if the range ever fluctuates in rain water. Since optimum pesticide molecule performance is reliant on a specific water ph. Could this be ill effective.
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Old 08-28-2012, 09:43 PM
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Found this, thought it might be somewhat useful. I would assume that the Ph of natural rain would change from area to area slightly? And Turfmd you would not be applying in a period in which rain is expected anyways right? So the Ph of rainwater would not matter as much as the water in which the pesticide was mixed correct.
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Old 08-28-2012, 09:44 PM
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I would question what the Ph of reclaimed water is more I would think. The city water you would have a little more stable expectations I would think than reclaimed.
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Old 08-28-2012, 10:03 PM
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http://www.elmhurst.edu/~chm/vchembook/190acidrain.html
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Old 08-28-2012, 10:26 PM
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pH is only one measure of water quality, Hardest and Bio carbons can have a much greater effect on Turf Grass than the pH of water. Some Golf Course will actually inject sulfuric acid into the Irrigation water because it is cheap and easy to do. Acid forming Fertilizer will help lower pH as will Sulfur. Dolomite etc will Raise pH etc However to change EC is a much harder and expensive to do. Bio Carbons will effect surface tension and Hydraulic conductivity. High EC (Electric Conductivity) or Measurement of soluble salts in a solution, will fill exchange sites and cause Fertilizer or pesticide leaching. Therefore pH of water is the least of our problems.

Basically the pH chart given only tells us what pH range most all element are available in the greatest quantity. Once we know 6.5 is approx that magic point on the pH scale, the chart above is really of no use.

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