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Sand is useful because it allows for good drainage, which allows for air to then reach the roots. Because of it's size, it does not compact as much as say clay, which once compacted is difficult to decompact.
If you take a look at the Custom soil recipes post I made (http://www.energeticforum.com/agricu...ml#post141148), you'll see that sand is included in all of them.
The gardening group that I mentioned last year, has just recently restarted backup (we managed to get some funding). Before we got planting, there were 3 classes that were provided by the conservation group, who have their office onsite. The first class covered soil, what was covered was basically similar to that of the The Mittleider method. The instructor had come to the same conclusions as Mittleider did decades earlier (the soil is the most important thing (in soil based growing)).
Basically good soils contain sand, as it gives it structure, good drainage, which then leads to aeration.
If anyone has seen aeroponics, but with mist (real mist, like fog and not sprayed water), then you will see the aeration connection at the roots.
If you take a look at the Custom soil recipes post I made (http://www.energeticforum.com/agricu...ml#post141148), you'll see that sand is included in all of them.
The gardening group that I mentioned last year, has just recently restarted backup (we managed to get some funding). Before we got planting, there were 3 classes that were provided by the conservation group, who have their office onsite. The first class covered soil, what was covered was basically similar to that of the The Mittleider method. The instructor had come to the same conclusions as Mittleider did decades earlier (the soil is the most important thing (in soil based growing)).
Basically good soils contain sand, as it gives it structure, good drainage, which then leads to aeration.
If anyone has seen aeroponics, but with mist (real mist, like fog and not sprayed water), then you will see the aeration connection at the roots.
Peace all! 
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