Roundup was Cardamine hirsuta
Fri, 05 Apr 2013 04:35:36 PDT
Dear Christian, I am very glad you are explaining how to explore and test a 
 hypothesis. I am afraid that many of our members might not quite grasp 
some  things, so keep it simple. I feel I am learning much more about a weed 
than I  really care to. Could make a decent subject for A MS Degree research 
project in  agriculture.
In a message dated 4/5/2013 4:07:02 A.M. Pacific Daylight Time, writes:

Lou : I  understand. I was not mentionning consistency as a test. For you to
better  understand my point of view, here is little information on my
background. I  worked for more than a decade as a scientist in very good
labs, on various  projects, and in different countries : I'm aware of
experimental design,  scientific methodology, and statistics - as well as
their limits and  limitations. Scientific result is all about  experimental

Collecting consistent reports from various  sources gives clues for
theoretical hypothesis formulation. I am not  engaged in a scientific
research about Cardamine, therefore not doing more  than trying to
understand what is going on at the level of hypotheses -  contacting your
group for more observations and eventually any hard science  tracks.
Bringing answers through science would require a serious planning  of a
complete study, and this is a lot of work I can't do myself - not to  be
achieved just with "one experiment to see". If you or a group of people  is
interested in starting some serious testing, I will gladly help and  provide
seeds, but I cannot do the work myself for various reasons  including

Nhu's design is the very start in an  investigation. It will only answer
what it tests. If it shows that  Cardamine seeds treated with roundup do not
germinate better than the  control lot, it will mean that (1) glyphosate is
probably not the direct  cause of what is observed in situ and (2) that
something else might be  going on in situ in relation to glyphosate. If it
shows that Cardamine  seeds treated with roundup germinate better than the
control lot, it will  mean that glyphosate triggers the germination of
Cardamine seeds. It will  not allow to know for sure that glyphosate is the
direct cause (although  reasonably, it may be, the cause could still be
genetics, soil interaction,  effect of a component in roundup or of a
byproduct of glyphosate  degradation, etc.), nor what mechanism is involved.
As you see, it is not  very helpful alone and needs to be considered as a
first step in a more  ellaborated plan.

I agree with you : there can be many things we have  not thought of, more
than one factor can be involved, factors can interact  or play a role in a
sequence, etc. The effect can result from a very  dynamic situation, and
good documentation about the effect is always a  requirement. Consistency of
observation is important to understand that a  phenomenon is not just a one
shot due to chance. I had it before coming  forward.

*Dr. Christian M. Lachaud,  PhD*
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