[Terrapreta] data set

[Tom Miles]

See http://terrapreta.bioenergylists.org/files/Summaries.pdf attached to the
story below at:

http://terrapreta.bioenergylists.org/haardsummary1207

 

Tom

 

 

 

From: terrapreta-bounces at bioenergylists.org
[mailto:terrapreta-bounces at bioenergylists.org] On Behalf Of Richard Haard
Sent: Thursday, December 06, 2007 7:32 AM
To: Terrapreta
Subject: [Terrapreta] data set

 

Hello All - For your interest  

 

I submitted to Tom for posting at  <http://terrapreta.bioenergylists.org/>
some initial soil analysis data from my charcoal block study. In am just
beginning to compile a report on this work. When it is posted you will see
soil analysis results averaged for each replication(2) for 2 dates , April
and October. Listed are pH, Buffer pH, OM, Nitrate, Cation Exchange Capacity
(CEC) and  base exchange components, % Potassium, % Magnesium, % Calcium.
Other soil analysis was taken but not presented here.

 

Keep in mind this is a 2 to 3 year study and no additional additions or
treatments will be done other than continuous cropping and harvest of all
growth, tops and roots, at our bare-root native plant nursery. It is my
attempt to emulate Christoph Steiner, et al research in Manaus 

 

Long term Effects of manure, charcoal and mineral fertilization on crop
production and fertility on a highly weathered Central Amazonian upland soil

 

http://terrapreta.bioenergylists.org/node/442


Our test was compost, charcoal (two sources) mineral fertilization and
control and permutations as was done in experiment above. We're in the moist
mild climate of the Pacific NW, USA on a sandy loam soil. It naturally
carries very high levels of potassium and calcium found also in unfarmed
soil. 


 I have never tried this kind of intensive soil testing before and am still
learning about season to season changes and how to interpet the data. I am
working now on photosets taken at harvest time and these will be posted as
well as a concise statement on the experiment terms and what I think the
results represent. 


Rich Haard - 


And thanks to Larry Williams for his work with me on this project and his
critical comments. 


 


 

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: /pipermail/terrapreta_bioenergylists.org/attachments/20071206/7b3ea4bb/attachment-0001.html