Terra Preta Glomalin and Companion Planting
August 26, 2007 at 4:31 pm (Tech and Citizenship, Terra Preta, urban farming)
The Terra Preta post has been the most popular post of mine by a country mile. It seems there’s a great deal of interest in this subject. I am no expert on the subject however. In fact I deliberately spread myself across a wide range of interests so as to get the broad view. So readers should keep this in mind when reading what I write.
However it seems to me that even after considering the potential that terra preta has in the remediation of degraded soils, the capture of atmospheric carbon in soils and for growing soil to counter soil loss it is still only one of a number of methods, that are being studied pretty much in isolation from complementary methods, that if combined could well be greater than the sum of their parts.
Systems are complex however and establishing the outcome of systems quickly becomes like the doubtless apocryphal tale of the chinese man who for his services asked the King to pay him using an equation that would double his rice payment for every square on the chess board, starting in one corner with one grain. Of course 1, 2, 4, 8, 16, 32 64 128 would mean that compliance with this request would mean a payment in rice of hundreds of thousands of tons. For organic systems the number of possible outcomes follows a similar pattern as the number of system components increases. That’s basically common sense.
On the other hand when I read about mushroom plant companion planting I see something which seems to have the potential for linking the fungal component of terra preta to plants. Now experiments with plants and mushrooms seems to show that this is very much hit and miss, but the results of one experiment show what is possible when you hit on the right combination.
Christiane Pischl of Fungi Perfect conducted an experiment whereby she planted brussel sprouts with mushroom spores. The result was that a brussel sprout elm oyster mushroom combination produced “4 to 6 times as much vegetable as those without’. Now that’s the mycelium plant combination. I would have to wonder what kind of result you would get from a char-mycelium-plant combination. It’s intriguing isn’t it?
Then of course you have your non-fungal EM “Enhanced Microorganisms’ experiments. Mr. Cho of the Korean Natural Farming Association provides a booklet in English for those who wish to make their own enhanced microorganism liquids from a variety of farm waste. His argument is that plants like people require different nutrients at different times and though I am no soil scientist that does strike me as something which is likely. I have a photograph of Mr. Cho pushing a 3 metre pole into the soil of his farm with little visible effort. Rather like pushing into a souffle.
Now consider some reports of Terra Preta soils replenishing themselves, growing like dough in a baking tin within a hole from which most of the black soil has been removed. I think of the souffle and the rising dough analogies together and I start getting a kind of tingling feeling.
If that were not enough consider what happens at the bottom of a compost heap, it leaches nutrients into the soil beneath it. Now something we already know from Terra Preta is that the char acts like a capture matrix removing nutrients from water that moves through the char layer. Alternatively, what would happen if you placed char under the leach field of a grey water system, which is somewhat similar to what comes out the bottom of a compost heap?
Now if it were possible to combine EM, Terra Preta and Fungi-Plant companion regimes what would you get? Would you get brussel sprouts the size of bowling balls? I have no idea what you could get. You could get Swamp Thing for all I know, but the thought is intriguing I think you’ll agree.
Now if you can increase the production of brussel sprouts by 400 to 600% by intensive management of natural systems it does have a bearing on the whole ‘let’s make the world’s farms into industrial agro businesses in hock to Monsanto, and agrochemical companies’ debate. I don’t know what kind of single crop yield improvement that Monsanto is getting from its sterile intellectual property seed with its capacity to be drenched in ever increasing amounts of agrochemicals, that seem to end up in our body fat to God knows what effect, but I somehow think it’s not a 400% to 600% increase.
Every technical advancement has political, economic and social ramifications as well. Now the whole idea of a small mixed farm run by a family seems far more suited to the idea of multiple products coming from the intensive use of small plots of land to create a variety of products, which in turn reduces their vulnerability to swings in commodity prices.
I think there’s about a couple of thousand research projects waiting in those last couple of paragraphs. These are my thoughts as someone who dabbles, perhaps someone with more technical skill than I will be as intrigued as I am and have the capacity to move things forward.


