did me SBM leach out?

apundt-tx(8 SW Austin)September 10, 2010

aug 27, 2010 I applied 50#s on SBM to my bermuda lawn.

This past week we got 7 inches of rain in 3 days from Tropical Storm Hermine. Any ideas if the rain leached it out or will the rain benefit the micro-organisms to start the nitrogen process.

I was planning on adding this years last fertilizer of Lady Bug Cottonseed Meal (7-2-1) on Sept 27th to help with the soil alkalinity.

Any thoughts....

southwest of Austin 3000sq/ft of celebration bermuda

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dogwind(Z8a TX)

Leaching is a term from the world of chemical fertilizers, because chemical fertilizers contain salt. Leaching only happens with water soluble fertilizers. SBM (and organics, in general) are not water soluble. Therefore you should be fine. It is possible for organic fertilizers to be simply washed away by a heavy rain, if your lawn was on a steep slope, and it rained hard enough to cause heavy runoff. But your SBM had a week or so on the ground before it rained. And your SBM would have begun the process of absorbing moisture, breaking down, and becoming fertilizer by the time it rained. I'm sure in your case, the rain will help it break down even faster, and will help.

    Bookmark   September 11, 2010 at 1:01AM
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While the nutrients in most organic "fertilizers" are not very water soluble there is a fairly decent chance that with that much rain in that short of time span the material itself could have been washed off the soil with the run off of the train.
What affect that much rain would have on soil bacterial activity depends on how long the water remains in the soil.

    Bookmark   September 11, 2010 at 7:27AM
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apundt-tx(8 SW Austin)

thank you two for the follow ups

    Bookmark   September 12, 2010 at 10:01PM
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dchall_san_antonio(8 San Antonio)

One thing that did leach out is any acidity your soil may have accumulated over the summer and spring (since the rains in Feb). You might keep an eye on it. If it turns yellow it is probably not from lack of fertilizer. It is probably from lack of iron. The only iron supplement that really works for us in SoTex is greensand. You can get it in Austin at John Dromgoole's nursery and probably some other places. Call around.

    Bookmark   September 15, 2010 at 9:35AM
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apundt-tx(8 SW Austin)

thanks for the info. how many 40# bags of greensand for 3000sqft bermuda?

    Bookmark   September 15, 2010 at 9:40PM
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dchall_san_antonio(8 San Antonio)

Three bags.

    Bookmark   September 18, 2010 at 8:39PM
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