Bryan Jasons wrote:Do we know that gypsum when added will do nothing useful in sandy soil?
Bryan Jasons wrote:How do we know that anything added will be leached in a sandy soil?
Bryan Jasons wrote:Also, the importance of being holistic and thorough - like Coleman or Soloman are - isn't lost on me. But I never planned on using this area for vegetables; I was thinking cover crops, sweet potatoes, millet or some other easy to grow crop that I have experience with. I already have vegetables gardens with mulch and cover crops being used in other places.
He then goes on to describe adding limestone to raise Ph, clay to counter the sandy soil, greensand and phosphate rock for minerals, and compost to bring fertility.
When I began gardening on my place in Maine, the soil test showed a Ph of 4.3(very acidic) and a note from the soil scientist warned that the ground did not seem suitable for agriculture. Well, every soil can be made suitable
Likewise, applying gypsum won’t help if the crop doesn’t have enough nitrogen,
added UW-Madison emeritus extension soil scientist Richard Wolkowski.
In research plots at Arlington, WI, his group found that grain yield
didn’t respond to the sulfur in FGD gypsum until adequate nitrogen was
provided. In fact, gypsum actually lowered yields when nitrogen was
applied at sub-optimal rates.
Bryan Jasons wrote:I'm wondering if an area of pure sand next to my field would benefit from gypsum. Most people talk about gypsum for clay soil, sodic soil, mineral deficient soil etc. but what about acidic sand? This soil is very deep, I dug down 3-4 feet and it only changed from brown sand to tan sand. Isn't this an advantage in that the roots can grow deeper than in a typical soil? This is where the gypsum comes in; studies show it can get into subsoils and alleviate Al toxicity, allowing roots to grow deeper and yields to increase. I'm hoping for a fertility boost, as the soil definitely needs one. I've never met or heard from anyone who has tried this though.