Posts tagged ‘soil structure’

Identifying Surface Soil Compaction

I had the opportunity to do a little field work, and came across a classic example of surface compaction.  Please note, try as I might to get good images, the pictures just don’t adequately convey the concept.  I’ll supplement the photos with textual description.

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I pulled a core with my push tube soil probe.  The probe shows about 14″ of exposed core, and I used the knife to ‘pick’ at the core to show soil structure.  The knife is placed at the breakpoint between surface compaction and structured soil.  Above the knife, the soil structure is lacking with no clearly defined soil peds.  Below the knife I can distinctly see peds that form medium to fine subangular blocks.  Again, the difference was much more striking in person.


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This is the same photo, but I’ve cropped the image to focus on the break in soil structure differences. Above the knife tip is structureless; below the knife is developed structure..

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You’ll notice how well the surface horizon holds together when I try to form a ball; this is due to moisture remaining in the surface layer.  The subsurface layer has a lower moisture content; notice how I cannot form as smooth of a ball without the soil crumbling. Implications? There are many implications, but most obvious is that the surface is retaining moisture, which may delay field work.


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March 31, 2009 at 7:30 am

Farm Focus Field Day – Soil Quality

Can you believe it is Farm Focus time already? Where did the summer go?

Please join us for the Farm Focus Field Day on Tuesday, July 29, 8 a.m. to 3 p.m. at the Marsh Foundation Farm in Van Wert (1229 Lincoln Highway, Van Wert, OH).

This years field day has four themed topics: 1) field demonstrations of new equipment, 2) field demonstrations of liquid manure, 3) soil structure, soil compaction, and soil quality workshops, and 4) crop input pricing. In this week’s podcast, I discuss one of the topic on soil quality:

July 17, 2008 at 8:00 am


Notice

This blog is no longer being maintained. Information on this blog may still be relevant, but for the latest agronomic information and farm management information please visit http://corn.osu.edu and http://ohioagmanager.osu.edu, respectively.

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