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What about garden gypsum? my understanding is that it does not affect Ph because of the sulfate in it so it kind of balances the Ph a bit. my understanding is that it helps with salts, and helps with compact soils, I use it very sparingly in my container plants. anyone else use this?
Costa Rican soils are generally acidic and the application of calcium is very common. I don't know about calcium hydroxide, it's a good question, but calcium carbonate is applied at a basic rate of .5kg. Per meter.My soil ph ranges from 5.8-6.3 which is pretty good for most things. For avocados and black pepper it can be important. Coffee and banana growers also use it.I have had some success treating Jakfruit that tends to have splitting fruit and physiogical problems with mangosteen.Peter