Great post Doc. The term "Organic" is used very loosely and is more of a buzz word these days. My ultimate goal is to grow and develop a soil out of natural growing, locally sourced ingredients. That isnt currently possible, so I have ordered some items. It's part of my personal challenge to be self reliant eventually.
From my understanding, coir will need more constant compost or ewc teas, as well as an additional sulfur input. I don't use coir, I stick to the peat.
I think we are trying to accomplish the same things with our final product. Smooth, clean, fresh tasting, doesn't hit or sit in your lungs, highest quality product. Believe me when I say you have been a huge inspiration towards me mineralizing my soil and putting an emphasis on calcium.
Can you go over different minerals that could be added and why or why not? ie. basalt, granite, glacial, volcanic, azomite, ect.
Thanks Doc.
Yep!
Basalt, granite, and all that aren't minerals in the sense that I'm talking about. They are rock powders that are full of individual minerals, salts, and silica in varying proportions. It's the proportion of the minerals in the rock powders you listed that are of interest.
Here's what we High Brix guys have found is the optimal soil:
5000-6000 pounds of calcium per acre
approx 350 pounds of phosphorus and potassium
500-600 pounds magnesium
200 lbs sulfur
80 pounds nitrogen split evenly between nitrate and ammonium
Trace elements in trace amounts
Humus perhaps 4-6%.
These numbers are slightly rounded on my part but still an ideal soil when achieved.
So, we would take your glacial rock dust and analyze it to see how much of it could or should be added to bring the soil into range based on the simplified formula I mentioned above. Same with glacial rock dust, SRP and Azomite. Many times with glacial rock dust, the sodium levels are too high.
We use calcium based rock powders, namely limestone, gypsum and carbonized limestone
Clay based rock powders, like Soft Rock Phosphate
Silica based rock powders like volcanic rock dust.
Limestone and Soft Rock Phosphate react in the soil and form an electromagnetic field that helps with water and wind erosion. HB growers may have noticed a white crust forming on top of the pots after applying Recharge, which has all these rock powders in it.....that's what I'm referring to.
Silica based rock powders creates paramagnetism in the soil. There's much to study in this area.
We pretty much know the makeup of good soil. What ingredients in what amounts are added to amend any given soil depends on two factors:
1. What is lacking in the pre-amended soil
2. What elements are present in the various rock powders.
A soil from the desert area in the American Southwest is going to need a very different amendment than a soil from Northern Maine or the Pacific Northwest.
This is one of the "blindspots" organic growers have. Let's say a guy in Oregon has a really great soil mix from locally sourced ingredients. His list of ingredients is obtained by a gardener in Georgia who sources local ingredients and makes the same soil mix that proceeds to underperform or burn plants! WTF?
Well, the guy in Oregon is amending a rich, volcanic soil with a good amount of humus. His locally sourced ingredients (rock powders, etc) all originate West of the Mississippi, mainly from North Dakota, Utah and BC.
Meanwhile, the Georgia gardener is amending a sandy loam with feather meal, fishbone meal, bat guano, alfalfa mea, crab meal, kelp meall and blood meal added, along with Dolomite for a pH stabilizer. His ingredients (rock powders, etc) come from Oklahoma, Texas and Mexico.
The two soils might differ in pH by 2 points. CEC could be radically different. MIneral content and ratio's are also going to differ greatly. They're not even the same soil, despite having the same ingredients:
Potting soil
Glacial rock dust
volcanic rock dust
marble dust
azomite
forest humus
EWC.
So, we use a soil test. We choose various ingredients to amend the soil, based on the soil test.
So, the simple answer to your question is that any and all of the materials you listed can be added depending on what the soil test says the soil needs.