The principal apatite crystal margins show a microcrystalline envelope attribute of coated grains. The envelope may well extend in direction of the centre from the grain ... [Present total abstract] eventually forming a wholly microcrystalline apatite body out of the Original coated grain, thus developing a peloid by the whole https://tsp-manufacturers-in-sri91245.spintheblog.com/36063070/tsp-for-soil-health-in-sri-lanka-options