Subject: Re: pH of soil

From: @hursley.ibm.com
Date: 7 Feb 1996 12:35:59 GMT

In <[email-masked]>, [email-masked] (Harmonie Rhoades) writes:
>   We are biology students from Mt. Shasta High School. We are working on
>a problem concerning the pH of soil and its affects on plants.  For our
>experiment we are changing the pH of three soils and planting equal
>numbers of vegetables, radish, lettuce, dill and carrots in each of the
>pots.  We are going to change the pH to 5 in one pot, 6, and 7 in
>another.  We must have a hypothesis stating what will happen but we are
>having a hard time finding the research to base it on.  If you have any
>information on this subject could you please help us. Thank you.
>
>Mandy Garcia
>Kim Harrison
>Kami Gray
>
>[email-masked]

The main effect of a change of pH in the growing medium is to alter the 
availability of the macro/micro nutrients. eg Fe, Zn, Mn are more available
at low pHs whereas Mg Ca are more available at high pHs.
Plants differ in their tolerance to low nutrient levels, so in your case you
might find that the lower levels of available Ca and Mg at low pHs may be	
noticable. Ca is used in the cell walls etc. and therefore when it is deficient
growing points may fail.

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From: @hursley.ibm.com
Date: 7 Feb 1996 12:39:39 GMT

>noticable. Ca is used in the cell walls etc. and therefore when it is deficient
Whoops should have added my name ... Barry Edge ([email-masked])

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From: [email-masked] (Harmonie Rhoades)
Date: Tue, 06 Feb 1996 10:57:48 -0700

Mandy Garcia
Kim Harrison
Kami Gray