Charcoal in agriculture: Experimental research at Fourth Corner Nurseries
Richard Haard, Fourth Corner Nurseries, Bellingham, Washington, January 3, 2008


I just finished over the last few days organizing images and data from my charcoal experimental plots. I am presenting a new set of posters showing root systems of the native shrub, Lonicera involucrata or black twinberry that I used as an experimental subject in these treatment plots this summer.

This will be the last of a series of piecemeal postings about my findings on the terrapreta reading list. In time, I will prepare a summary of what I have accomplished this year, the shortcomings, what I feel I have learned from this work about using charcoal and my plans for continuing this experiment for 2 or more growing seasons.

Biochar Trials at Fourth Corner Nursery
Richard Haard, Fourth Corner Nursery, Bellingham, WA, December 6, 2007
Hello All - For your interest

I submitted to Tom for posting [attached] 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


Charcoal Experimental Plots
Rich Haard and Larry Williams at Fourth Corner Nurseries, Bellingham, Washington, May 6, 2007


Making charcoal at 4CN for our experimental study.
Richard Haard, Larry Williams, Fourth Corner Nursery (4CN), Bellingham, WA April 13, 2007


Charcoal Making
Rich Haard, Fourth Corner Nursery, Bellingham , Washington, March 31, 2007

Terrapreta interest group

Here is a set of images about our charcoal making project this weekend. It is a smothered pit method, first time for myself . We did open the lower end of the pit after 5 hours and take out about 40 gallons , then we put the unburned wood back in and recovered. We will be looking at it again in about 18 hours.


Richard Haard: Affinity of fungi and crop plant roots to charcoal
Richard Haard, February 12, 2007

The image below illustrates the affinity of fungi and crop plant roots to charcoal.

Charcoal placed in a fertile garden for a few months showing how crop roots (Swiss chard) and fungi are attached to this medium as habitat
Charcoal placed in a fertile garden for a few months showing how crop roots (Swiss chard) and fungi are attached to this medium as habitat
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