[Stoves] Basic soil--Basic info !

[Alex English]

Andrew,
Perhaps you have seen  solubility charts?

http://www.avocadosource.com/tools/fertcalc_files/ph.htm
It is slightly different for soiless media.
Very much a chemist's take on soil fertility.

Alex

On 15/12/2012 5:20 PM, ajheggie at gmail.com wrote:
> Hi Frans, good to see your contribution.
>
>   On Sat, 15 Dec 2012 22:22:03 +0100,"Frans Peeters"
> <peetersfrans at telenet.be> wrote:
>
>>         Basic soil needs humus to bring pH 8,5 to 6,5
> This is because humus (humic acid?) is acidic but so will low
> temperature char that  still contains pyroligneous chemicals??
>> Basic soil by Ca exess has lack of Mg take up to form Chlorofil leef green
>> .Result yellow leaves .
> Ye Ca inhibits take up of magnesium, we have it once roots reach the
> chalk on thin soils here, it's known as lime induced chlorosis.
>> Char has no chemical effect .
> The carbon in char is inert but presumably its the ash associated with
> the carbon matrix that makes high temperature char basic.
>> Sometimes water and minerals into the char are usefull at pH 5,5 -7.
> Could you expand on that?
>> Basic soil makes trace minerals unsoluble and not avaiable to take up .
>>
>> Zn and Se can profit of basic soil .
>>
>> Too acid under pH 5 dissoves Aluminium from clay ,a plant killer .
>>
> I take from that that if the soil becomes too acid the aluminium
> becomes labile and available, hence it kills the plants.
>
> So similarly if the soil is too basic it makes zinc and selenium
> unavailable?
>
> AJH
>>
>> Regards
>>
>> Frans