There is some interesting research info on the net about the effects on soil biota but nothing I've found worrying, in my opinion at least.
It just changes populations a little which (in theory) weakens the crops resistances a little, but compared to most other chemicals is relatively safe.
Obviously fungii, algae, bacteria and some protozoans use the shikimate pathway as plants do (so it isn't exactly the boon to benefitting soil health that some wish to believe it to be) but it also isn't a terrible thing for occasional and educated usage from that point of view.
High organic matter levels lessen the effects, according to most research I'm aware of, as that lessens the effects of most external factors, including fungal resistance/general resilience in the crop.
Extrapolating that further (or guessing?) that if it does make for a more prone crop, then the pesticides used to counter any effects would likely have much more effect on the soil biota than the initial glyphosate application to dessicate the previous crop.
Nothing has "no effect" but in my belief and research on the topic, roundup is the lesser of evils.
It's more public perception that's the issue, they don't want it in the foodchain but the alternatives will have effects, no doubt about that!
It would certainly be an interesting "what if" all the time and effort spent on developing chemistry hadn't been, the food supply model would look nothing like it does today.
Oversupply would be much less of an issue (unless of course people lived longer as a result of different dietary choices).
But that's off the topic of the thread
Hi Pete,
In the above - I note there is no mention of the influences of worm activity, which is seeing impacts on the applications, so thought I would see what your thoughts are on the studies carried out.
From the papers I have read - (and not ones testing on Eisenia sp here), there is some quite interesting information about the impacts it is having, both short term (as low as 1 week), but more importantly long term periods.
The studies document the way in which it is impacting reproduction success rates, the growth inhibiting affects found, the avoidance of worms to entering areas that are treated with glypho etc.