Your question: You mentioned that you had applied 100 tons of limestone to one acre of garden. Was that in one application or was that over a period of years? If the latter, how many? I have 3 tons of superfine aglime(limestone not calcium. hydroxide)which I am working into the yard and garden. In about 500-600 square feet I have applied 15-20 cubic feet of limestone(5 wheelbarrow loads 0f 4 cubic feet not quite full) together with texas greensand(5% potassium, 10% iron), gypsum and bonemeal in the ratio 4:2:1:1. Since the container mix ratio of these ingredients you gave to Invincible was these ingredients to the same amount of soil, i'm concluding that I can mix in more limestone into the soil as long as I maintain the ratio of ingredients up to the same amount of topsoil that the plants will grow in. Is that right? To do that bags of greensand will be too costly. I will use a ton and a half of granite sand. Or is decomposed granite better, filtered up to a 1/4 inch? The garden store person recommended the ddecomposed granite as a soil amendment over the sand for clay soils, but you said to use powdered granite, which I am interpreting as granite sand.
Answer: It may be Best for a person to rebuild their soil by applying small amounts of Limestone like I have suggested with gypsum each year, rather than apply Hugh amounts at one time !
The Reason is that when one applied Hugh amounts, then the Calcium in the limestone may try to Oxidize everything else in the soil and it may give problems !
Just because a Big change is made, does not mean that everything else will fall in place immediately !
Take my advice on this one, for I did what I did just to Prove some points that one could apply Very Large amounts of Hi-Calcium Limestone and could still raise Top Quality crops, but it was not without some problems in the begining, for it takes the soil time to adjust and even everything else out !
It totally changes the way one can raise the crops one wants to raise, but one can raise very tasty crops, if one understands the actions taking place and is able to help match the adjustment up in the soil, and one of the most Important things is Mulching to help control the moisture and temperature !
For a lot of Calcium provide Lots of Reaction for any Acid applied to the soil or generated in the soil by the Bacteria, if you can keep the Bacteria Living ?
Smile Tis your choice.