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Project Updates Stories of Soil

Soil Chromatography in Chiang Mai

Besides the fun of trying something new, and photo ops, we found a very clear indication of how fun soil chromatography can be:


Magic the black cat sniffing soil, Dec 2018.

Although we only had 5 good chromatograms out of the set of soil samples we tested, this process revealed several things:

  • fun
  • accessibility
  • colours!
  • ease of participation at different steps of the process
  • darkroom construction does take some work
  • soil qualities beyond the quantitative, chemical analysis
Our 5 samples at the end of the 2 days of work.

In this short article, we’ll take you through the steps (which we’ve documented in full here) so you can do your own soil chromatogram activity!

We give thanks to Europe-based HUMUSapiens, for their open wiki and inspiration across the world.


First of all, why make chromatograms with soil?

Soil chromatography was developed and introduced by Lilo Kolisko (visit the webpage! Highly recommended for a view to a woman scientist’s life and thinking in the early 20th Century), a woman scientist – who studied with the biodynamic thinker, Rudolf Steiner, in Germany.

Since then, it’s been played with as a mixture of artscience: by hackers, experimenting with non-traditional science, and by scientists and foresters: check out this resource from the University of Western Australia.

The chromatogram’s main strengths are what it doesn’t do: capture and quantify soil’s chemical properties into a number. What it does do, is transfer its properties onto a medium (filter paper) that allows the human eye to witness direct patterns emerging from the flow of chemical and other properties within the soil’s living system. In this, biodynamics considers qualities within each living organism. There are other words for this in other indigenous wisdoms (of which biodynamics is … really not). (In Singapore, we may hear of chi, prana, or semangat–different ways of looking at energy, within systems of holistic health and embodied vitality. The performance artist nor has a beautiful piece titled “Semangat in practice”, in Making Kin, published 2022 by Ethos Books.)

Left: A4, soil not dried, no plant matter. Right: A3: dried, no plant matter.

Chromatograms allow a human eye not accustomed to working with soil’s ecology, to see how soil is living and complex, to be understood qualitatively and viscerally and not only quantitatively or morphologically, as a vibrant, living matter.

Although we did want to understand how soils in two locations appeared, part of the process (which we didn’t do perfectly!) was also to see how this transformation of qualities occurs.

In the lab, chemical analysis these days is measured to a chemical standard; from there, a list of quantities of which chemical compound is generated.

When well done, chromatograms reveal not only proportions, but also vitality: jagged edges and sharp notches. Ours are just beginners in training. HUMUSapiens in Europe has much more on soil with their soil camps.

Left: B1: not dried, without plant matter; Right: B3: dried soil without plant matter.

Although these resources exist, it was hard finding a simple workflow for non-hacker culture participants. So we made one ourselves (after our series of mini-success (chromatogram blooms!) and mini-missteps (questionable labelling, and AgNO3 blots on Huiying’s hands).

Made by the soil team, Dec 2018

Select soil samples

First, find the spots you’d like. You can select any spots! Or consider comparing spots based on shade/non-shade, where you guess some soil may be doing better because you’ve added some compost, etc.

Collecting samples can be done by different hands.

Prepare soil solution

  • Mix soil with 5 times the amount of base solution. Some guides recommend 0.1% sodium nitrate solution. We used baking soda which is more easily available, adding in molar excess (until no more baking soda dissolves.)
  • Leave soil solution to sit for at least 12 hours (Zuazagoitia & Villarroel, 2015)
Guides said you had to dry the soil first… but we wanted to see what undried soil would show up as. So we compared 2 sites, with 2 conditions: dried and non-dried. The additional bottles are just additional controls – we didn’t go on to develop chromatograms for them (we must have run out of either filter paper or time).

Prepare darkroom

  • Includes Red lights, tweezers, weighing scale, glass bottle for silver nitrate solution (1 per filter paper is best, or 5 if you are doing 10 sets for e.g.), filter paper fitted with wick, box for drying filter paper that ensures no light enters during the day

Prepare filter paper with silver nitrate solution 

NOT the right way to measure out AgNo3 (should be done in a darkroom!)
  • This has to be done in a darkroom, with gloves. Always use gloves while handling silver nitrate solution. As a solution, silver nitrate stains hands permanently. While it eventually comes off as your skin renews itself and sheds, it forms jet black stains as silver oxidises under sunlight. It can be removed with strong toxic chemicals (e.g. some form of cyanide) but we recommend leaving it be until it comes off.
  • Measure out enough silver nitrate to make a 0.5% silver nitrate solution. E.g. 0.5g to 100ml of water.
  • [Optional] Mark out filter paper to be prepared in order of preparation. E.g. FP 1, FP 2, FP 3 or any other coding system that suits you. This is an additional step to track the consistency of the silver nitrate application.
  • Place the filter paper with wick to the solution. Let the silver nitrate seep into paper a radius of 4cm. This takes approx. 20 minutes per filter paper, depending on the quality of the paper. 
  • Let filter paper dry overnight (still in darkroom conditions) or 2 nights during rainy season.

Wick soil solution onto prepared filter paper

  • On prepared, now dry filter paper, add a new wick.
  • Add 1 filter paper per soil solution. Each filter paper takes approx 15-20 minutes.
  • [Observation step] Observe the changes on the paper as the solution is wicked up: does solution begin showing up? How fast does the solution take to be wicked up? Do this if your paper quality is not consistent or to catch light leakage in the darkroom.

So that’s it! We plan to do this again, sometime, in a different site…. when that will be will appear πŸ™‚

Read/download the full step by step instructions here:

Written by Huiying.

Also as a testament to how qualitative and aesthetic understandings of ecology are seen today: you might like this passage from The Moon and Madness, written in 2011. Today we’ve moved a bit further on from the idea that moon cycles are completely separated from our human and ecological cycles of life and death. πŸ™‚

Categories
Project Updates Stories of Soil

Design and Culture

With Ng Wei Yang

Our design principles are woven into the soil project, and value systems too.

Here we introduce our first completed designs, something we’re very proud of, that embodies what we consider a living culture for the project.

We also take some time to find out about the person behind the designs.

Interconnection, community, and the cycle of knowledge (re)generation are values we work towards. We believe they are needed more than ever today, to rebuild what we have of already-broken agriculture and food systems, and divert the flow of energy and resources from industrial food systems, towards ones that can support microsolidarity networks, decolonial food cultures, and place-based communities that support their farmers.

Working on the illustrations and logo for the project was a unique experience, one that slowly took shape over time, just like the project itself. I took the important values about the project and used that to direct the decisions I made throughout the design process for the illustrations and logo.

Wei Yang, concept artist

Transitions aren’t always easy, but they are also joyful. Work, done well and hard won, with others, teaches us fulfillment and lessons that make us all better people.

These designs were conceptualised and made in collaboration with Ng Wei Yang. Find out more about his work and ongoing projects at www.ngweiyang.com/.

Wei Yang is a concept artist and illustrator based in Singapore. He graduated from the Singapore University of Technology and Design in 2017 and subsequently from FZD School of Design in 2020. His journey in art and design started from a couple of design courses in university, which eventually led him to pursue concept art. Wei Yang’s interest in both real-life and imaginary environments drive him to create environment concept art and illustrations. Outside of work, he enjoys taking pictures and travelling.

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Stories of Soil

We can rebuild soil – The Hidden Half of Nature

Aditi has started reading the book, she loves parts of it! Luckily for the rest of us, there’s a video with the authors online, along with a really good explanation of why soil and carbon is part of us–our bodies and our food. And that we can rebuild soil in a matter of years–not the centuries of geological rock formation, as we tend to think. Check out The Hidden Half of Nature:

Categories
Stories of Soil

Leaky roots, Liquid carbon

The story of soil is a complex, intriguing one. Our project draws to us people, resources, and opportunities to uncover more facets of its nature. So we’ve decided to start collecting notes about things that surprise us here – notes on soil. Here we post new facets of our world’s soil body when the inspiration strikes us (sometimes literally~).

Oftentimes, when we talk about making soil, soil scientists point out that soil takes a long time to form. Yet as Dr Christine Jones mentions, in an interview, the building of topsoil versus the weathering of rock are two different phenomena, and human activity changes the speed at which they occur.

“the flow of liquid carbon to soil is the primary pathway by which new topsoil is formed

Read about her work – and Amazing Carbon, here., or read extracts of her work below.