Michelle’s Reviews > The Holistic Orchard: Tree Fruits and Berries the Biological Way > Status Update

Magnesium serves to pull soil particles together, whereas calcium will spread the particles farther apart. . . . Slightly more magnesium is called for in a porous soil, whereas clay requires higher levels of calcium to improve drainage and aeration.
Desired Ca:Mg ratios: sandy 5:1, loam 7:1, clay higher
Desired Ca:Mg:K percent base saturation ratios: sandy 65:16-18:3-4, loam 70:12:4, clay 76:10:4-5